Showing posts with label Networking. Show all posts
Showing posts with label Networking. Show all posts

Wednesday, 7 October 2015

Communications: Net Neutrality Write Up

Q)I need information on Internet Neutrality ( Net Neutrality) covering not only the common sense aspects (why we should stop the gov) but how it will differently affect consumers and most importantly the WEB 2.0 generation of start-ups and openness ( open source applications, p2p sharing, social media/networks, etc.) and entertainment ( the surge of independent musicians and artists.)
Are there any big companies (preferably in communications or media) who are pushing the envelope and would ultimately benefit?

There should be a way to connect this to the concept of their becoming two internets, the paid and unpaid. 


Sol:
Net neutrality (also Network neutrality, Internet neutrality) is one of the principle proposed for all the users accessing networks and participating in the Internet that gives no restrictions by the ISP’s(Internet service providers) and also the governments on sites, contents and platforms, also the kinds of equipment that may be attached while sending to others, and the modes of communication involved.
Service providers argue that if net neutrality is not enforced, they will have sufficient incentives to build special high-quality channels that will take the Internet to the next level of its evolution. But if they do get their needy wish, net neutrality is then consigned to the only dustbin, and they do build the new services, but no one uses that. If the networks that are mostly built are the only ones that are publicly discussed, which is a likely prospect.

What will service providers publicly promise to do, when they are given with complete control of their own networks, is to build the special facilities for the streaming movies? But there are few fatal defects to the above promise. One is that movies are not likely to offer all that much income. The other is that delivering movies in real-time streaming audio/video is the one of the wrong solution, expensive and unnecessary.

If Internet service providers are to derive the most significant revenues and also the profits by exploiting the available freedom from the net neutrality limitations, then they will need to be engaged in much more.
Such calls for preemptive regulation are only unjustified. There is no evidence for those broadband operators who are unfairly blocking access to the websites or online services today, and there is no other reason to expect them to do so in the near future. No firm or corporate has any sort of bottleneck control over the market power in the speedy broadband marketplace; it is also very much a competitive free-for-all, and no one has any idea about what the future market will look like with so many new other technologies and operators also entering the picture. In the absence of the clear harm, government typically doesn’t regulate in the preemptive, prophylactic fashion as a CBUI members are requesting.

Moreover, from being something the regulators should forbid, vertical integration of the new features and also the services by broadband network operators is one of the essential part of the innovation strategy and companies will need to use for competing and offer customers the available services they demand.

Network operators also have got the property rights in their systems so that they need to be acknowledged and also honored. Net neutrality mandates would be flout on those property rights and hence reject freedom of contract in this marketplace.

This will also affect the consumers in such a way that they will not be able to enter some of the sites or they will be not be able to access or download some of the information since user are not restricted on the data access from the website, so that same user can go for unlimited downloads resulting in others not able to access the required information in case of emergency. Even in perspective to WEB 2.0 generation of startups and openness the social community sites are loaded with unnecessary junk data due to net neutrality as a result the maintenance  of the website as well as database becomes complex also resulting in follow ups so that there is no illegal data coming into the websites from any of the users.

Allegations of discrimination have come up with many heated intellectual debates as well as countless legislative and judicial squabbles in the United States of America. Regardless of the available veracity of the accusations in the given case, the charges are quite often sensitive and serious. Sometimes the word “discrimination” gets thrown in a very cavalier manner by the parties watching to enlist the support of government in a dispute in which it doesn’t belong. A good recent example of that comes from the field of Internet policy. A heated industry catfight has erupted between major technology companies over how Internet content should be accessed through high-speed broadband networks owned by cable or telephone companies. One of the group called the
Coalition of the broadband Users and also the innovators which adds among its members like Amazon, Apple, Microsoft, EBay, Yahoo and Disney has petitioned the FCC (Federal Communications Commission) to implement rules to ensure that cable and BSPs (broadband service providers) will not make use of their control of speedy networks to disturb consumer access to the websites or other users access. The CBUI proposal or the variations of it, has been typically labeled “digital nondiscrimination Or “Net neutrality”. Despite in the absence of the evidence that network operators are currently being imposed “discriminatory” restrictions on the network users.

CBUI members claim the FCC which adopt the preemptive safeguards which will ensure that the consumer access to Internet content is unfettered and full in the near future. In filings with the FCC and CBUI members the claim that cable and telephone companies are forging into a broadband duopoly which will also define the Internet for some time and network operators to encumber or the infringe in the relationships among their customers in between their customers and destinations on the Internet. Stanford University professor Lawrence Lessig—famed for leading and similar antidiscrimination antitrust crusade against the Microsoft that has endorsed the CBUI Net neutrality proposal, arguing, about the network owner is increasingly in the existing position of picking as well as choosing how the network gets used. Hence others, such as FCC commissioner Michael Copps, are speaking about the issue in far more apocalyptic terms.

We could be on the verge of the inflicting terrible damage on the Internet network. I am worried that we could be able to  witness the start and also the end of the available network or internet as we know it. Which proponents of the internet neutrality such as Copps, Lessig, and CBUI all members fear is that Broadband Service Providers will leverage their supposed market power is to force the customers to accept a variety of unsavory limitations on the use of the available networks owned by Broadband service providers. For eg, access to some specific sites might be restricted, the attachment of few technologies or some devices might be forbidden and also additional networks might not be allowed due to security reasons to develop at the periphery, or at edge, or at  the network (i.e., where consumers interface with the network). For eg, Broadband Service Providers might seek to curtail the attachment of wireless fidelity(WIFI) devices or networks by the consumers.

It is definitely plausible that Broadband Service providers might restrict consumer’s access to the network content or restrict attachment of various other devices or networks at the available edge of the system. Since there are some examples of Broadband Service Providers engaged in such tasks today, there might be scenarios in which it is exactly sensible for a network owner to un-restrict the existing restrictions or differential pricing available schemes on its speedy broadband customers. Network owners may also discourage the use of other certain devices on the available networks to stop system crashes and network interference. They may also need to price the services separately to protect network from congestion or in capturing higher revenues on better bandwidth intensive services. They might need to integrate the content vertically and conduits on their available systems, or make partnerships with other firms so that they can help them to reach the new customers and also offer them superior services. Also there might be scenarios in which stoppage of access to certain websites makes sense for most of the network operators. They might block access to certain websites that is in some controversy or it might contain material where some subscribers might find it as objectionable, or they might block sites simply to protect running the ads of a leading corporate competitor.

Consumers will consider few restrictions; say as a prohibition on the upcoming release of viruses on a broadband network, which is trivial and fully acceptable. Other stoppage, such as a restriction on the access to the competitor’s website or a specific competitor’s advertisement, will be considered an intolerable constraint by many of the corporate users.

But the important concept here is whether any of this should be considered as an illegal work and is to be prohibited by law. Most regulators adopt the regulations in governing the underlying available infrastructure of speedy broadband networks or the existing overall architecture of the network to ensure that openness or neutrality and also the end-to-end characters of the network are preserved. Also what would be the impact of such a regulation in terms of the existing economic incentives for current and upcoming future broadband operators to fully innovate and also invest in most expensive new networks. Do the rights of property of network owners come into picture here? Do high tech network operators are even having the property rights in this case. Those are also complicated with the questions that will deserve extensive exploration also before policymakers rush to adopt the supposedly simple internet neutrality regulatory guidelines. In the last, the only real question in this debate can be simply stated as who will decide. That is nothing but who will call the shots of the network owners or someone else when it always comes to questions about the use of infrastructure in the Information age. For the reasons listed below, it would be wise for the policymakers to make allow the entities that own and also operate broadband networks in the freedom to experiment with few various business models to better serve the consumers. The alternative of preemptive and prophylactic government regulation also has far too many downsides. Discrimination in this concept is something difficult to define with and also open to the very much subjective topic. Disputes over what constitutes on this discrimination will definitely lead to endless and regulatory proceedings which will open the door to a great deal of the mischief by all the companies or all the organizations that will feel that they should have greater control over how the broadband networks are well operated, either in a better-faith effort to improve the existing operation of those networks or to be frank in a more self-centered effort to game with the regulatory system to their own as an advantage. Net neutrality regulation also has the property rights Broadband Service Providers possess in the infrastructure they will also own and operate. Hence by ignoring property rights and by opening the door to the increased regulatory meddling, internet neutrality regulation threatens to the retard innovation and also investment in new broadband facilities. Instead of keeping so preoccupied with maximizing number of the consumer welfare within the confined existing systems, proponents of the net neutrality, especially the impressive list of well heeled corporate that are part of CBUI will need to put more thought and energy into idea of how the networks of the future are to be funded and constructed. The principle that CBUI members being seem to ignore is that competition in the above creation of networks is very important as competition in the goods as well as services that get sold over existing networks.

Big companies definitely gets benefited from this since there is not restrictions on the net access and usage hence they will always go for heavy use large downloads resulting in more use when compared to individuals where they also make large profits with the help of this hence they get benefited from net neutrality.

Finally, proponents of Net neutrality will also results in ignoring the fact about the network capacity usage and the profit motive which will always provide very powerful checks on overly restrictive as well as carrier activities. Carriers definitely make money always by only carrying huge traffics. Capacity utilization is one of the very important concepts in the field of networking business. A speedy broadband network without the subscribers is like a airplane with the empty seats and a recipe for financial disaster. Broadband Service Providers will not want to restrict the traffic flows or encumber Net-surfing activities for the fear of diminished capacity use as as frustrated consumers will consume less of those available networks, or leave the network altogether as free. That is why cable operators will not configure their set top boxes to middle with the consumer access to traditional television channel stations. Even though they will have the technical capability to restrict the existing stations consumers watch or even though when they want to watch them, cable operators understand that their video with customer base will grow only if they will expand the range of the viewing options, not curtail or artificially limit of them. Hence finally in attempting to attract as many as subscribers as possible, Broadband Service Providers will also need to take few steps to make sure the integrity as well as performance of the networks or to expand the range of the service offerings to attract new customers. That is why some minor restrictions on the certain types of network uses where activities will occasionally be imposed by carriers. For eg, cable companies currently provides access to the certain video channels on a pay-per-view plan basis, largely because most users don’t want, in that way so their children will not gain access to those channels. Broadband Service Providers will have to strike an dedicated balance, but the profit will motive them with a powerful incentive not to restrict activities on their networks. That is especially the case of the speedy broadband market which grows increasingly competitive hence consumers have more options from which they can choose.

Hence there should be a way to connect this to the concept of their becoming two internets, the paid and unpaid. Generally there are policies saying about the fair usage policy where the users are restricted to some limits in the unlimited plans of data usage so that if they cross the limit of that then they should pay extra from the actual rentals. This will act as paid internet where it the usage is within the limits then it is concept of free internet. This will definitely benefit the Internet service providers in limiting the user’s mainly corporate users since the restriction is made such that unlimited access is controlled.


References:


1) "Network Neutrality ". A guide to network neutrality,   2008.
2) The Delusions of Net Neutrality | Andrew Odlyzko | Voices ... (n.d.). Retrieved from --voices.allthingsd----20080904/the-delusions-of-net-neutrality/
3)      A e-book book on net neutrality, towards co regulatory solution, 2009
4) "Vint Cerf speaks out on net neutrality", Net neutrality importance By Davidson, Alan , 2005

5) "Common sense about network neutrality". Support on internet neutrality By Farber, David,   2006). 

Wednesday, 26 November 2014

Networking Homework Help: Explain why security is important for WLANs, even more ...

Q)Explain why security is important for WLANs, even more so than for wired networks. 

Sol:

More security is needed and security is very much important in case of wireless LANs, when compared to wired LANs. The main reason behind this is in case of wireless LANs by making use of the wireless authentication of the authorized wireless user any one can make use of it also hacking the wireless network is very easy if it is not password protected. Since in most of the WLANs the users are not protected by a unique password, since wireless LANs are always used in case of places like college campus or office campus where multiple users can access the network. Hence in case of wired LAN there is a need for the dedicated channel or cable through which every user can get connected to the network whereas in case of wireless LANs there is no need for it, sometimes it will not even ask for any security passwords. Hence any user can get connected to the network and use it without paying for it. As a result more security is important for WLAN’s when compared to Wired LAN.

Networking Assignment Help: What specific steps can be taken to improve security in WLANs...

Q)What specific steps can be taken to improve security in WLANs?

Sol:

 The below steps can be taken to improve the security in WLANs:
a) Initially wireless network has to be authorized and authenticated.
b) Also all the users try to get connected to that particular has to be authorized and authenticated.
c) Every user connected to the network has to be uniquely identified by their own unique username and password.
d) Multiple users with same username and password should not be allowed to connect to the network.
e) Every user has to be properly disconnected so that no one in queue must be able to continue to get connected to the network with their username and password.


Think and Answer Assignments: Minicase IV Household Wireless page....

Q)Your sister is building a new two story house which measures 50 feet long by 30 feet wide and wants to network her family’s three computers together. She and her husband are both consultants and work out of their home in the evenings and a few days a month.  Each has a separate office with a computer, plus a laptop from the office that they occasionally use. The kids also have a computer in their playroom. They have several options for networking their home:

a) Wire the two offices and playroom with Ethernet cat5e and put in a 100Base-T switch.

b) Install one Wi-Fi access point ($85) and put Wi-Fi cards in the three computers (the laptops already have Wi-Fi)

c) Any combination of these options

There are many possible solutions to this problem.  What would you recommend, considering their current hardware configuration as well as potential expansion? Justify your recommendation.           

Sol:


The best possible solution is to go for installation of Wi-Fi access points followed by installation of Wi-Fi cards for the desktop computers. Anyways laptops will definitely have Wi-Fi inbuilt so there is no need for separate installation of the cards in laptops. The reason behind this is looking at the future definitely the desktops are getting replaced by laptops. Also laptops are portable, which means we can carry them any where we need but if they are connected to some network cables then we will not be able to access the network wherever we carry the laptops. Also in case of desktops if we place it in 1st floor but tomorrow we need it in the last floor then there is need to work on the network connectivity in it only labor is involved in shifting but network connectivity is always there since it is independent of the location within the office campus or two story house limits. Hence the recommendation here is to go for Wi-Fi connection.

Networking Homework Help: There is an ever growing range of physical media being offered such as fiber...

Q)There is an ever growing range of physical media being offered such as fiber, coax, satellite, IP over power lines, a number of wireless technologies, and more. Recently, the telephone companies announced 4G wireless communications and the IEEE has WiMax at Gigabit rates. What criteria would you use to select technologies for your business and for your home?
Sol:
The following are the criteria being used to select technologies for my business:
a) Multiple connections with maximum speed.
b) Higher bandwidth with lesser price.
c) Unlimited downloads with no additional charges.
d) Unlimited access within the coverage area irrespective of the machines being used.
e) Full time high speed networks without any congestion.

The following are the criteria being used to select technologies for my home:
a) Not more than two connections at a time.
b) Very lesser cost, irrespective of download limits.
c) Limited access but reduction in the monthly bill.
d) Moderate speed and bandwidth, irrespective of the congestion.
e) Lesser monthly rentals provided there are additional charges for download if it crosses the available limit.


Monday, 24 November 2014

Networking Assignment Help: Explain the RSA Public Key Encryption Scheme in detail...

Q)Explain the RSA Public Key Encryption Scheme in detail.In particular ,how do the encryption and decryption algorithms work? Explain also how you choose the public and private keys.Suppose a user picks n=17*5; i.e .,p=17 and q=5.How should he pick the public key and the private key (i.e., d and e)? Give the encryption and decryption algorithms.

Sol:
RSA Public Key Encryption which was invented by Cocks (GCHQ), independently, by Rivest, Shamir and Adleman (MIT). Say for example let ‘p’ and ‘q’ is the two large prime numbers.
Let N = p*q be the modulus, then Choose ‘e’ relatively prime to (p-1)*(q-1)
Find d such that e*d = 1 mod (p-1)*(q-1)
Here the Public key is given by (N, e) and the Private Key is given by ‘d’.

The encryption as well as the decryption algorithm works as follows:
To encrypt the message M compute
C = Me mod N
And to decrypt the message C compute
M = Cd mod N
Please recall that e and N are public, hence if attacker can factor N, then he can definitely use ‘e’ to easily find the value of ‘d’ since e*d = 1 mod (p-1)*(q-1)
Factoring the modulus will break the RSA, therefore it is not known that whether the factoring is the only one way to break RSA.
Suppose a user picks N=17*5; i.e., p=17 and q=5.
Hence N= 85,
(P-1)*(q-1) = 16*4=64
Choose ‘e’ such that it is relatively prime to 64. Hence e=5
Find‘d’ such that e*d = 1 mod 64, we find that d = 7 works

Public key: (N, e) = (85, 5)
Private Key: d = 7

Encryption as well as decryption algorithm works as follows:

Public key: (N, e) = (85, 5)
Private Key: d = 7
Suppose message M = 8
Cipher text C is computed as
C = Me mod N = 85 = 32768 = 17 mod 85

Decrypt C to recover the message M by
M = Cd mod N = 177 = 410,338,673
= 12,434,505 * 85 + 8 = 8 mod 85


Saturday, 22 November 2014

Compare the telephone network & internet. List few similarities & differences.

  1. A telephone network is a connection oriented circuit switched network. This means that a connection must be established between the two endpoints. Bandwidth is reserved for this circuit.
The Internet is a connectionless packet switched network. This means that packets can be sent without following an established connection and bandwidth can be shared with other users.

  1. In a telephone network, there is a dedicated connection established between the two end users and it is a fixed line also the it has got a fixed monthly rental for the connection but call charges are extra based on the duration of the call and region(local or STD).
In case of Internet there is no dedicated connection but the all authorized users are connected to the network using a unique IP and the cost will be dependent on the data downloads being made. 

  1. Telephone network can only give one to one connection only using a dedicated channel in the network.
Internet can have one-to-many connections through any channel which is free at that point of time.


  1. In case of Telephone networks the billing is done based on the duration of the call and area of calling.
In case of internet the billing will be mainly on the usage of the data in bits per second.

  1. The telephone network will be able to connect to internet network using a dial up connection and a dial up modem, but the data rate will be very low.

But in case of internet the connection is made to the network using a broadband modem and hence the data rate will be very high.

Prepare a 3-4 page paper comparing and contrasting five of the design patterns listed below!!!

Choose any five from the list:

1) Adapter
2) Data Access Objects
3)Facade
4)Observer
5)Proxy
6)Firewall

Need an answer for this, just comment on this post for more discussion on this!!!

Looking for an assignment completion on Network Security design for an e-commerce Application??


Just comment on this post to get the answer!!!

Looking for the Answers on Networking question like SNMP based network management system??

Discuss how an SNMP-based network management system could be incorporated into such a network. Your answer should include details concerning the architecture of the network management system itself, and its various components, and a discussion about which types of devices should be ‘managed’, and why your answer should include samples of management queries sent to the managed devices and the associated responses returned by the devices. Also include configuration details where appropriate.

Comment on this post if you need the answer for this!!! 

Tuesday, 17 May 2011

Networking Assignment Help

Part 1

You are tasked with writing rule sets for two firewalls that protect your network and form a DMZ. All traffic from your internal network to the Internet passes through the DMZ. All servers that are accessible from the Internet reside inside the DMZ. All computers inside the network (internal network and DMZ) have private IP addresses. All traffic to and from the Internet passes through a NAT device which is located just inside the perimeter firewall. All computers on this network are Windows computers

Servers in the DMZ
Service Public IP Address Private IP Address Comments
HTTP/HTTPS 200.100.100.10 192.168.20.10
FTP 200.100.100.11 192.168.20.11
DNS 200.100.100.12 192.168.20.12 Uses TCP for zone transfers, services DNS lookup requests from all computers in the internal network and DMZ
Email 200.100.100.13 192.168.20.13 SMTP
Proxy 200.100.100.14 192.168.20.14 Not accessible from the Internet. Client computers connect to the proxy service on port 8080



Clients on the internal network: All user workstations access web sites via the Proxy server. There are three different internal subnets: 10.10.10.0/24, 10.20.20.0/24 and 10.30.30.0/24. Computers on the 10.10.10.0/24 subnet may access FTP servers on the Internet. Computers on the 10.20.20.0/24 network may access an SSH server on the Internet with the IP address 220.20.30.110. All computers on the internal network may access the company’s Email, DNS, FTP and web servers that reside in the DMZ.

Computers on the three internal subnets use dynamic NAT pools as follows when making connections to the internet.
Private IP address range NAT Pool
10.10.10.0/24 200.200.200.50 through 200.200.200.100
10.20.20.0/24 200.200.200.101 through 200.200.200.150
10.30.30.0/24 200.200.200.151 through 200.200.200.200


Answer the following:
(1)Write the two rule sets for the two firewalls that will allow only the traffic described to flow.



Part 3

You are tasked with implementing a rule set for a firewall. Internal computers are running Windows operating systems.

(3) In the following table create a rule set to implement the following requirements.
• Internal users are allowed to access web servers on the Internet (both HTTP and HTTPS) but do so via a proxy server that has an IP address of 192.168.20.5.
• Access to the following servers is not allowed:
a. www.riaa.com
b. www.mpaa.org
• Users are allowed to directly access an SSH server running at andromeda.cs.odu.edu
• Computers on the Internet should be allowed to connect to your email server (SMTP only) in order for your company to receive emails from other organizations. The IP address of the email server is 192.168.20.10.
• Your email server must be able to connect to other email servers on the Internet to forward outgoing email (SMTP only).
• All other traffic is not allowed

Rule
Number Protocol Source Address Source
Port Destination Address Destination
Port Direction Action





Part #4


You are tasked with implementing a rule set for two firewalls protecting your network in a DMZ configuration. Internal computers are running Windows operating systems.

(4)In the following table create a rule set to implement the following requirements.

Note:
NAT occurs just inside the perimeter firewall.



DMZ Servers
Purpose Private IP Public IP
Web proxy 192.168.10.10 150.150.150.10
FTP Proxy 192.168.10.11 150.150.150.11
DNS 192.168.10.20 150.150.150.20
Web server - public 192.168.10.30 150.150.150.30
Web server – corporate only 192.168.10.40 150.150.150.40
Email 192.168.10.50 150.150.150.50



Internal network servers
Purpose Private IP
Microsoft SQL Server Database 10.50.50.100

Requirements
Workstations
• User workstations are on the two subnets 10.10.10.0/24 and 10.20.20.0/24
• User workstations can access web servers on the Internet (http and https) but only via a proxy server which resides in the DMZ
• User workstations can access ftp servers on the Internet but only via an FTP proxy server which resides in the DMZ
• User workstations can access the DNS server which resides in the DMZ


DMZ Servers
• Web proxy may access web servers on the internet
• FTP proxy may access FTP servers on the internet
• DNS server will accept incoming requests from both internal workstations and from the Internet.
• DNS server will accept zone transfer requests from other name servers on the internet
• The public web server will accept requests from the internet only via HTTP
• The corporate web server will accept requests from the internet only via HTTPS
• The corporate web server will make connections to the internal Microsoft SQL Server database on its default port.
• The email server will accept SMTP requests from the internal network and the Internet. It will also make SMTP requests to other email servers on the Internet.

Internal Server
• The internal Microsoft SQL Server database server will accept incoming connections from the corporate web server in the DMZ

Rule
Number Protocol Source Address Source
Port Destination Address Destination
Port Direction Action

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