CS610 VU Current Final Paper Spring 2012

otal Questions: 52

Total Marks: 80
Questions & Marks Division:-
1*40 MCQs, 4*2 Marks, 4*3 Marks, 4*5 Marks

Total Questions: 52
Total Marks: 80
Questions & Marks Division:-
1*40 MCQs, 4*2 Marks, 4*3 Marks, 4*5 Marks.

Question 41:- How many bits in MAC Address according to their scheme? (2)

Question 42:- What are the services provided by TCP? (2)

Question 43:- If some packet has some error, which IP datagram header field indicates you about error? (2)

Question 44:- What are the functions that IP multicast abstraction allows an application running on an arbitrary computer to do? (2)

Question 45:- Can length of an Ethernet be increased to three segments of 500 meter by adding a repeater to connect them? (3)

Question 46:- Which type of NAT fails if an application uses the IP address instead of domain name? And why? (3)

Question 47:- What mechanisms can a host Data copied from vu solutions dot com to determine the path MTU? (3)

Question 48:- In client-server interaction, if no signal is given, then how can an application know when communication has arrived? (3)

Question 49:- Differentiate between routing techniques used within the autonomous system and outside of the autonomous system? (5)

Question 50:- What do we mean by connection multiplexing in connection between NIC and physical network? (5)

Question 51:- How does ICMP define error and informational massages? (5)

Question 52:- Why network administrator doesn’t suggest fine timer transmission? Have any solution of this problem? Explain it with solid reasons. (5)

CS610 VU Current Final Paper Spring 2012

Is there any technique for achieving reliability through TCP? 5 marks
Give reasons for which IPv4 need to be changed ? 5 marks
In a star organization there are 120 systems connected in a network. Give your comments about delay, delay should be smaller or larger. Give reasons? 5 marks
How TCP provides reliability? 3 marks
How TCP and IP interact with each other? 3 marks
Describe four factors for network classification? 2 marks

Q: differentiate between IP and transport protocol with the help of example. 2 marks
Q: Give the main advantage and disadvantage of RIP. 2 marks
Q: Tel the first assignable IP address from a 128.140.80.24/20. 2 marks
Q: how was the NAT implemented. 2 marks
Q: IS ATM include LAN and WAN network. If yes what kind of connection is established. 2 marks
Q: is IP multicasting beneficial? Defend your answer with proper reason. 3 marks
Q: Can the length of the segment be increased 500 meter by adding three repeater one with each segment. It can be done or not. 3 marks
Q: How an administrator can handle static and dynamic routing. 3 marks
Q: IS TCP/IP suit include ARP. What kind of messages are in ARP. 3 marks
Q: Traceroute continues to increment the Time To Live until the value is large enough for the datagram to reach its final destination. What happens when the TTL is sufficiently large for the datagram to reach its destination? 3 marks
Q: describe characteristics of BGP. 5 marks
Q: describe IPV6 addressing notation. 5 marks
Q have there is a technique for achieving reliability through TCP. 5 marks.

CS610 Fall 2011 Final Term 12 Feb 2012

Q1- What is ICMP and what type of errors internet layer can detect ? 5 mrks
Q2- In which situation RIP support for default routers? 5 marks
Q3- Give Pros and Cons of statci and Dynamic routing . 5 marks
Q4- How ICMP used to test different tools? 3 marks
Q5 – How does host join and leave a group ? 3 marks
Q6- When packet lost what is the procedure TCP adopt ? 3 marks
Q7- In this subnet block 192.168.1.0/26 What is the range of assignable host address? 3 mark
Q8 – Write the differece between Explicite and implicite frame type . 2 marks
Q9 – Give the concept of zero compression regarding IPV6 . 2 marks
Q10 – Which technique is used for insertion and deletion in routing table . 2 marks
Q11- Can multiple IP addresses assigned or not on different interfaces of a router . 2 marks
Q12- In which process bacword compatibility of 100-base- T is done ? 2 marks
Q13- Does OSPF only share information with an area or does it allow communication between different areas ? 2 marks

CS610 GDB Solution Spring 2012

Do you think wireless networks will totally replace the wired or fixed networks in coming future? Prove validity of your opinion.

Idea Solution:
• Wired Local Area Networks make use of Ethernet cables and network adapters. Numerous computers can be wired to one another by using an Ethernet crossover cable. Wired LANs also need vital devices like hubs, switches, or routers to aid further computers.
• For dial-up connections to the Internet, the computer hosting the modem should administer Internet Connection Sharing or similar software to share the connection with every other computers on the network.
• Broadband routers permit easier sharing of cable modem or DSL Internet connections, furthermore they often include built-in firewall.
• Ethernet cables should proceed from each computer to a different computer or to the central device.
• The accurate cabling configuration for a wired LAN differs depending on the merge of devices, the form of Internet connection.
• Following hardware installation, the lasting steps in configuring either wired or wireless LANs do not contrast a great deal. Equally rely on standard Internet Protocol and network operating system configuration options.
Advantages and Disadvantages of Wired Networking
advantages:
• The equipment is inexpensive.
• Many computers have a wired network adapter.
• Wired networks transfer information more swiftly
• Wired networks are generally more secure than wireless networks
disadvantages:
• Running the wires from each room within the home can be a difficult task.
• Network cables can look disorganized.
• Network cables can disconnect or become faulty consequently causing the connection to fail.
• Adding more computers to a wired network may result in unexpected expense if you run out of connections on your network and could slow down the network.
All wired networks differ from each other. The most familiar type of wired network is an Ethernet network.


Wireless vs. Wired 
There are two kinds of network technologies:
• Wireless - communicates through radio waves
• Wired - communicates through data cables (most commonly Ethernet-based)

Why choose a wireless network?

Wireless networks don't use cables for connections, but rather they use radio waves, like cordless phones. The advantage of a wireless network is the mobility and freedom from the restriction of wires or a fixed connection. The benefits of having a wireless network include:
• Mobility and freedom - work anywhere
• No restriction of wires or a fixed connection
• Quick, effortless installation
• No cables to buy
• Save cabling time and hassle
• Easy to expand
Also known as Wi-Fi, or Wireless Fidelity, wireless networks allow you to use your network devices anywhere in an office or home, even out on the patio. You can check your e-mail or surf the Internet on your laptop anywhere in your house. There is no need to drill holes in the wall and install Ethernet cables. You can network anywhere - without wires. Outside your home, wireless networking is available in public "hotspots," such as coffee shops, businesses, hotel rooms, and airports. This is perfect for those of you who do a lot of traveling.

Why choose a wired network?

Wired networks have been around for decades. Wired networking technology found today is known as Ethernet. The data cables, known as Ethernet network cables or wired (CAT5) cables, connect computers and other devices that make up the networks. Wired networks are best when you need to move large amounts of data at high speeds, such as professional-quality multimedia. The benefits of having a wired network include:
• Relatively low cost
• Offers the highest performance possible
• Fast speed - standard Ethernet cable up to 100Mbps.
• Faster speed - Gigabit Ethernet cable up to 1000Mbps

WLAN vs LAN
LAN stands for Local Area Network, which is a collection of computers and other network devices in a certain location that are connected together by switches and/or routers that facilitate the communication of the network elements. Each computer or network element is connected to the switches/routers via a UTP cable. The added letter in WLAN stands for wireless. This is a type of network where the data is not transmitted via cables but over the air through the use of wireless transmitters and receivers.WLANs are deployed in areas where a wide number of computers may connect to the network but not at the same time. Places like coffee shops often add WLAN to their shops to entice more customers who do not stay for extended periods. Even at home where you have a somewhat fixed number of computers that connect to the network, WLAN is also preferred as it gives users the freedom to move around the house and carry their laptops with them without needing to fuss with cables. For areas where the computers are pretty much fixed, a wired LAN is very desirable due to the advantages that it offers.First off, a wired LAN is much faster compared to a WLAN. Most wireless routers nowadays are limited to a theoretical maximum speed of 54mbps while a contemporary wired LAN has a bandwidth of 100mbps. Gigabit network equipment can even ramp this up to 1000mbps or 1Gbps. This might not be such a big issue for browsing the internet or sending email but when you are copying large files, it can take a while with a WLAN.WLANs are also vulnerable to attack as just about anyone with a strong enough transceiver is able to detect the signal. Access can then be achieved by breaking the encryption used by the router through certain software. The information that is being transmitted through the WLAN can also be collected by malicious person and used in a variety, often destructive, ways. In order to intercept data in a wired LAN, you need to physically connect to a switch or a router.Summary:1. LAN refers to a wired network while WLAN is used to refer to a wireless network.2. LAN is commonly used in fixed networks while WLAN is common in areas where computers are moved quite often.3. WLAN is more convenient to users compared to LAN.4. LAN is much faster compared to WLAN.5. LAN is more secure compared to WLAN. 

CS610 GDB Solution June-July 2012

 CS610 GDB Solution June - July 2012

There are two ways to connect a computer to a network: wired or wireless. Sometimes this will determine the kind of router you purchase, but fortunately today most offer both options.

A wired connection requires an Ethernet cable be run between the router and your computer. In a wireless connection, you use hardware in your computer to communicate with the router without that cable.

Both have advantages and disadvantages so to help you pick the right one for you, here are 5 things to consider when deciding on a network connection.

1. Ease of Set-Up

Wired connections are easier to set up. With most modern computers you can simply plug in the cable and get on the Net. Wireless requires configuring the router and at least one extra step on the computer’s side: searching for the correct network to connect to. If you live in an apartment building in the city and go to connect to your network, you’ll probably see a dozen or more different possibilities.

2. Reliability and Speed

Everybody who has used both wired and cordless home telephones knows how much more likely the cordless varieties are to pick up interference and experience problems of quality. The same can be true for wireless Internet. While hardware has improved over the years, other electrical devices can still potentially interfere with your Internet, in some cases causing disconnections and delays. And like cordless phones, problems increase as you get farther away from the router. There are devices to fix such problems, but they can be costly and may require some trial and error.

3. Speed

Wired is almost always faster than wireless, and never slower. This is due to the reliability issues mentioned above and to the technology itself, which simply hasn’t caught up to Ethernet-level quality.

4. Convenience

Clearly wireless is more convenient on a day-to-day basis. Once it’s been set up, you can access the Internet from any computer in the vicinity of the router. If you can run Ethernet cables throughout your house you can achieve a similar level of convenience while keeping the reliability and speed, but it’s a huge undertaking and may not even be possible if, for example, you rent an apartment.

5. Security

This is arguably the most important of these points and the one too few give much thought.

A wired network is fully contained. In order to connect to it, you must have physical access to the router. On the other hand, a wireless network is not contained. Your neighbors, people on the street, or those in the restaurant next door can all potentially find your network on their computers. There are two reasons this should concern you.

First, you don’t want people you don’t know using your Internet connection. It’ll be slower to you and any questionable actions they take online will be traced back to you, not to them.

Second, it’s not difficult for a hacker to intercept data sent through an unsecured network. All of the banking, purchasing, and communication you do online could potentially be maliciously saved to a computer. You can imagine the possibilities for identity theft, credit card fraud, and so on.

 

CS610 Assignment # 5,, Q#1 Idea Solution

 CS610 Assignment # 5,, Q#1 Idea Solution