Exam Details
| Subject | advanced computer networks | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | June, 2017 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No:
Question Paper Code B2212
(AUTONOMOUS) M. Tech II Semester Supplementary Examinations, June 2017
(Regulations: VCE-R14) ADVANCED COMPUTER NETWORKS
(Computer Science and Engineering) Date: 05 June, 2017 FN
Time: 3 hours
Max Marks: 60
Answer any FIVE Questions
Each Question carries equal marks
1.
Which layers in the Internet protocol stack does a router process? Which layers does a link-layer switch process? Which layers does a host process?
5M
Suppose there is exactly one packet switch between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are R1 and R2, respectively. Assuming that the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length (Ignore queuing, propagation delay, and processing delay.) 7M
2.
Why is an ARP query sent within a broadcast frame? Why is an ARP response sent within a frame with a specific destination MAC address?
6M
What are some of the possible services that a link-layer protocol can offer to the network layer? Which of these link-layer services have corresponding services in IP? In TCP?
6M
3.
Suppose there are three routers between a source host and a destination host. Ignoring fragmentation, an IP datagram sent from the source host to the destination host will travel over how many interfaces? How many forwarding tables will be indexed to move the datagram from the source to the destination?
6M
Compare and contrast the IPv4 and the IPv6 header fields. Do they have any fields in common?
6M
4.
What do you mean by Additive-increase, multiplicative-decrease congestion control? Explain in detail.
5M
Host A and B are directly connected with a 100Mbps link. There is one TCP connection between the two hosts, and Host A is sending to Host B an enormous file over this connection. Host A can send its application data into its TCP socket at a rate as high as 120Mbps but Host B can read out of its TCP receive buffer at a maximum rate of 50Mbps. Describe the effect of TCP flow control.
7M
5.
Describe how Web caching can reduce the delay in receiving a requested object. Will Web caching reduce the delay for all objects requested by a user or for only some of the objects? Why?
6M
Suppose Alice, with a Web-based e-mail account (such as Hotmail or gmail), sends a message to Bob, who accesses his mail from his mail server using POP3. Discuss how the message gets from Alice's host to Bob's host. Be sure to list the series of application-layer protocols that are used to move the message between the two hosts.
6M
6.
Explain in detail about IEEE 802.11 standard.
6M
Explain the working of mobile IP.
6M
7.
Explain the concept of WDM in detail.
6M
Explain how optical routers are different from normal router.
6M
8.
Explain the following types of Virtual Private Networks:
iii. Remote Access VPN
iv. Site to Site VPN
6M
What is the role of a SIP registrar? How is the role of an SIP registrar different from that of a home agent in Mobile IP?
6M
Question Paper Code B2212
(AUTONOMOUS) M. Tech II Semester Supplementary Examinations, June 2017
(Regulations: VCE-R14) ADVANCED COMPUTER NETWORKS
(Computer Science and Engineering) Date: 05 June, 2017 FN
Time: 3 hours
Max Marks: 60
Answer any FIVE Questions
Each Question carries equal marks
1.
Which layers in the Internet protocol stack does a router process? Which layers does a link-layer switch process? Which layers does a host process?
5M
Suppose there is exactly one packet switch between a sending host and a receiving host. The transmission rates between the sending host and the switch and between the switch and the receiving host are R1 and R2, respectively. Assuming that the switch uses store-and-forward packet switching, what is the total end-to-end delay to send a packet of length (Ignore queuing, propagation delay, and processing delay.) 7M
2.
Why is an ARP query sent within a broadcast frame? Why is an ARP response sent within a frame with a specific destination MAC address?
6M
What are some of the possible services that a link-layer protocol can offer to the network layer? Which of these link-layer services have corresponding services in IP? In TCP?
6M
3.
Suppose there are three routers between a source host and a destination host. Ignoring fragmentation, an IP datagram sent from the source host to the destination host will travel over how many interfaces? How many forwarding tables will be indexed to move the datagram from the source to the destination?
6M
Compare and contrast the IPv4 and the IPv6 header fields. Do they have any fields in common?
6M
4.
What do you mean by Additive-increase, multiplicative-decrease congestion control? Explain in detail.
5M
Host A and B are directly connected with a 100Mbps link. There is one TCP connection between the two hosts, and Host A is sending to Host B an enormous file over this connection. Host A can send its application data into its TCP socket at a rate as high as 120Mbps but Host B can read out of its TCP receive buffer at a maximum rate of 50Mbps. Describe the effect of TCP flow control.
7M
5.
Describe how Web caching can reduce the delay in receiving a requested object. Will Web caching reduce the delay for all objects requested by a user or for only some of the objects? Why?
6M
Suppose Alice, with a Web-based e-mail account (such as Hotmail or gmail), sends a message to Bob, who accesses his mail from his mail server using POP3. Discuss how the message gets from Alice's host to Bob's host. Be sure to list the series of application-layer protocols that are used to move the message between the two hosts.
6M
6.
Explain in detail about IEEE 802.11 standard.
6M
Explain the working of mobile IP.
6M
7.
Explain the concept of WDM in detail.
6M
Explain how optical routers are different from normal router.
6M
8.
Explain the following types of Virtual Private Networks:
iii. Remote Access VPN
iv. Site to Site VPN
6M
What is the role of a SIP registrar? How is the role of an SIP registrar different from that of a home agent in Mobile IP?
6M
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