Routing TCP IP Volume II CCIE Professional Development

1:

Give several reasons why replicated unicast is not a practical substitution for true multicast in a large network.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

2:
What range of addresses is reserved for IP multicast?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

3:
How many subnets can be created from a single Class D prefix?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

4:
In what way do routers treat packets with destination addresses in the range 224.0.0.1–224.0.0.255 differently from other multicast addresses?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

5:
Write the Ethernet MAC addresses that correspond to the following IP addresses:
239.187.3.201
224.18.50.1
224.0.1.87

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

6:
What multicast IP address or addresses are represented by the MAC address 0100.5E06.2D54?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

7:
Why is Token Ring a poor medium for delivering multicast packets?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

8:
What is join latency?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

9:
What is leave latency?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

10:
What is a multicast DR (or querier)?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

11:
What device sends IGMP Query messages?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

12:
What device sends IGMP Membership Report messages?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

13:
How is an IGMP Membership Report message used?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

14:
What is the functional difference between a General IGMP Query and a Group-Specific IGMP Query?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

15:
Is IGMPv2 compatible with IGMPv1?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

16:
What IP protocol number signifies IGMP?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

17:
What is the purpose of the Cisco Group Membership Protocol (CGMP)?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

18:
What is the advantage of using IP Snooping rather than CGMP? What is the possible disadvantage?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

19:
What devices send CGMP messages: routers, Ethernet switches, or both?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

20:
What is Reverse Path Forwarding?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

21:
How many hosts constitute a dense topology, and how many hosts constitute a sparse topology?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

22:
What is the primary advantage of explicit joins over implicit joins?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

23:
What is the primary structural difference between a source-based multicast tree and a shared multicast tree?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

24:
What is multicast scoping?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

25:
What are the two methods of IP multicast scoping?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

26:
From the perspective of a multicast router, what is meant by upstream and what is meant by downstream?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

27:
What is an RPF check?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

28:
What is a prune? What is a graft?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

29:
What is a prune lifetime? What happens when a prune lifetime expires?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

30:
What is a route dependency? How does DVMRP signal a route dependency?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

31:
Is DVMRP a dense-mode protocol or a sparse-mode protocol?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

32:
Is MOSPF a dense-mode protocol or a sparse-mode protocol?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

33:
What is the name and type number of the LSA used exclusively by MOSPF?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

34:
Can an MOSPF router establish an adjacency with an OSPF router that does not support MOSPF?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

35:
Define the following MOSPF router types:
Interarea multicast forwarder
Inter-AS multicast forwarder
Wildcard multicast receiver

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

36:
Is CBT a dense-mode protocol or a sparse-mode protocol?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

37:
What are a CBT parent router and a CBT child router?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

38:
Describe the two ways a CBT DR can deliver packets from a source to the core and the circumstances under which each method is used.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

39:
What is a PIM prune override?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

40:
What is a PIM forwarder? How is a forwarder selected?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

41:
What criteria does PIM use to select a DR?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

42:
What is a PIM SPT? What is a PIM RPT?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

43:
What two mechanisms are available for Cisco routers to automatically discover PIM-SM RPs?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

44:
Of the mechanisms in Question 43, which should be used in multivendor router topologies?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

45:
What is a C-RP?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

46:
What is a BSR?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

47:
What is an RP mapping agent?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

48:
What is the difference between an (S, G) mroute entry and a (*, G) mroute entry?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

49:
What is the major drawback with a bidirectional CBT tree between the source and core, as opposed to a PIM-SM unidirectional tree from the RP to the source?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

50:
What is PIM-SM source registration?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

51:
When does a Cisco router switch from a PIM-SM RPT to an SPT?

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________