ITC212 Internet technologies

1.1 Assign network addresses to the five subnets

1.2 Suppose that there are 21 hosts in A-D. Does your answer to Question 1.1 change? If changed, please assign network addresses to the five subnets as

Q1.1. 1.3 For the case in Q 1.1, what is the network prefix advertised by router R1 to the public Internet?

Question 2: IP addressing.

2.1 Discuss the Global unicast, unique local and link local addresses of IPv6. Your answer must provide comparisons with IPv4 public and private addresses.

2.2 What is NAT and why it is utilized in IPv4?

Question 3:

Compare Link state and Distance vector routing protocols at the network layer. Discuss the advantages and disadvantages of the protocols. Your answer must also list examples of Link state and Distance vector routing protocols.

Question 4:

A 120-byte message is sent through a private internet using the TCP/IP protocol suite (IPv4). If the protocol adds a 15-byte header at each layer (assume headers are added only at layers 5, 4, 3, and 2), what is the efficiency of the system (the ratio of the number of useful bytes to the number of total bytes)? (3 Marks)
Question 5: Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte 104. Suppose that Host A then sends two segments to Host B back-to-back. The first and second segments contain 30 and 60 bytes of data, respectively. In the first segment, the sequence number is 105, the source port number is 500, and the destination port number is 80. Host B sends an acknowledgement whenever it receives a segment from Host A. 5.1 In the second segment sent from Host A to B, what are the sequence number, source port number, and destination port number? 5. 2 If the first segment arrives before the second segment, in the acknowledgement of the first arriving segment, what is the acknowledgment number, the source port number, and the destination port number? 5.3 If the second segment arrives before the first segment, in the acknowledgement of the first arriving segment, what is the acknowledgment number?

This assessment task will assess the following learning outcome/s:

• be able to define and explain various internet terminologies.
• be able to describe and analyse the role and importance of internet technologies in the modern world.
• be able to describe and evaluate emerging internet technologies such as Internet of Everything (IoE) and web applications.
• be able to explain how different application layer services such as client-server and Peer-to-Peer Paradigms work in the internet.