1. We noted that network layer functionality can be broadly divided into data plane functionality and control plane functionality. What are the main functions of the data plane? Of the control plane?

2. What field in the IPv4 datagram header can be used to ensure that that a packet is forwarded through no more than N routers?

3. When a large datagram is fragmented into multiple smaller datagrams, where are these smaller datagrams reassembled into a single larger datagram?

4. Do routers have IP addresses? If so, how many?

5. How many bits do we have in an IPv6 address? We use hexadecimal digits (each with 4 bits) to represent an IPv6 address. How many hexadecimal digits do we need to represent an IPv6 address?

6. What is the 32-bit binary sequence equivalent of the IP address 158.68.15.32?

7. Consider a datagram network using 8-bit host addresses. Suppose a router use longest prefix matching and has the following forwarding table:

Prefix Match Interface

01 0

000 1

10 2

001 2

11 3

For each of the four interfaces, give the associated range of destination host addresses and the number of addresses in the range.