TEL103: Telecommunications 3

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Assignment 2 Part 2

1. Identify four things provided by ICMP.
2. Occasionally IP datagrams are fragmented due to the MTU of a hop. What information does ICMP provide about fragmented IP datagrams?
3. Which type of ICMP message supports the PING utilify?
4. Identify ICMP's most common uses.
5. Briefly describe the contents of an ICMP ECHO REQUEST packet/
6. Why do most PING utilities send a series of several ECHO REQUESTs?
7. How many ICMP ECHO REQUESTs are sent when pinging an IP host from a Windows XP PC?
8. What will happen if someone tried to ping the broadcast address for a LAN segment?
9. TRACEROUTE provides two things, a list of routers along the path and:
10. PMTU will discover the MTU for a particular path. Why is it important to know the MTU for an entire path?
11. A router set to discard ICMP packets is called a:
12. What is the "all-routers" multicast address?
13. Identify the type of packet that allows hosts to passively learn about available routes.
14. What is the "all-hosts" multicast address?
15. Identify the two portions of an ICMP header.

• Available Routes
• Firewalking
• Gateway
• ICMP ECHO REQUEST packet
• IP Address Scanning
• Optimal Route
• Path Discovery
• PMTU
• PMTU Discovery
• Pathping
• PING
• Reachabilty
• Route Tracing
• TRACERT