COMPUTER NETWORKS & SECURITY

Which transmission media provides the highest transmission speed in a network?

The data link layer takes the packets from network layer and encapsulates them into frames for transmission.

A 4-byte IP address consists of

Network layer firewall works as a

Which of the following is false with respect to TCP?

The header length of an IPv6 datagram is

Which of the following are transport layer protocols used in networking?

Which layer of the TCP/IP stack corresponds to the OSI model transport layer?

Public key encryption/decryption is not preferred because

Which one of the following is not a public key distribution means?

Define computer network. Discuss various types of network topologies in computer network. Also discuss various advantages and disadvantages of each topology.

Explain different types of errors in data transmission. Write about redundancy, detection versus correction, forward error correction versus re-transmission and coding.

Discuss the terms 'sub-netting' and 'super-netting'. You are given the IP address of 193.103.20.0/24 and need 50 subnets. How many hosts per network and total networks do you get once subnetted?

Explain RIP in your own words. Take a network graph (group of routers) and explain how routing is performed.

Differentiate between TCP and UDP. Suppose a process in host C has a UDP socket with port number 6789. Suppose both host A and host B, each sends a UDP segment to host C with destination port number 6789. Will both of these segments be directed to the same socket at host C? If so, how will the process at host C know that these two segments originated from two different hosts?

(a) SNMP
(b) FTP
(c) SMTP
(d) WWW

Design a security service that provides data integrity, data confidentiality and non-repudiation using public-key cryptography in a two-party communication system over an insecure channel. Give a rationale that data integrity, confidentiality and non-repudiation are achieved by your solution. (Recommendation : Consider the corresponding threats in your argumentation)

Explain public-key cryptosystem. In a public-key system using RSA, you intercept the ciphertext $ C=10 $ sent to a user whose public key is $ e=5 $, $ n=35 $. What is the plaintext M?

Which transmission media provides the highest transmission speed in a network?

The data link layer takes the packets from network layer and encapsulates them into frames for transmission.

A 4-byte IP address consists of

Network layer firewall works as a

Which of the following is false with respect to TCP?

The header length of an IPv6 datagram is

Which of the following are transport layer protocols used in networking?

Which layer of the TCP/IP stack corresponds to the OSI model transport layer?

Public key encryption/decryption is not preferred because

Which one of the following is not a public key distribution means?

Define computer network. Discuss various types of network topologies in computer network. Also discuss various advantages and disadvantages of each topology.

Explain different types of errors in data transmission. Write about redundancy, detection versus correction, forward error correction versus re-transmission and coding.

Discuss the terms 'sub-netting' and 'super-netting'. You are given the IP address of 193.103.20.0/24 and need 50 subnets. How many hosts per network and total networks do you get once subnetted?

Explain RIP in your own words. Take a network graph (group of routers) and explain how routing is performed.

Differentiate between TCP and UDP. Suppose a process in host C has a UDP socket with port number 6789. Suppose both host A and host B, each sends a UDP segment to host C with destination port number 6789. Will both of these segments be directed to the same socket at host C? If so, how will the process at host C know that these two segments originated from two different hosts?

(a) SNMP
(b) FTP
(c) SMTP
(d) WWW

Design a security service that provides data integrity, data confidentiality and non-repudiation using public-key cryptography in a two-party communication system over an insecure channel. Give a rationale that data integrity, confidentiality and non-repudiation are achieved by your solution. (Recommendation : Consider the corresponding threats in your argumentation)

Explain public-key cryptosystem. In a public-key system using RSA, you intercept the ciphertext $ C=10 $ sent to a user whose public key is $ e=5 $, $ n=35 $. What is the plaintext M?