Data Communication and Networking – Network Layer: Delivery, Forwarding and Routing MCQs

1. In _______ delivery, both the deliverer of the IP packet and the destination are on the same network.

2. In _______ delivery, the deliverer of the IP packet and the destination are on different networks

3. In _______ forwarding, the full IP address of a destination is given in the routing table.

4. In _______ forwarding, the mask and destination addresses are both 0.0.0.0 in the routing table

5. In _______ forwarding, the destination address is a network address in the routing table

6. In _______ forwarding, the routing table holds the address of just the next hop instead of complete route information.

7. The idea of address aggregation was designed to alleviate the increase in routing table entries when using ________

8. The principle of ________ states that the routing table is sorted from the longest mask to the shortest mask

9. The use of hierarchy in routing tables can ________ the size of the routing tables

10. _______ deals with the issues of creating and maintaining routing tables.

11. A _______ routing table contains information entered manually.

12. A _______ routing table is updated periodically using one of the dynamic routing protocols

13. The input and output ports of a router perform the ________ layer functions of the router.

14. The routing processor of a router performs the ________ layer functions of the router

15. The task of moving the packet from the input queue to the output queue in a router is done by _________

16. A static table is one _______

17. A dynamic table is one _______

18. For purposes of routing, the Internet is divided into ___________

19. ____________ is a group of networks and routers under the authority of a single administration.

20. Routing inside an autonomous system is referred to as _______________

21. Routing between autonomous systems is referred to as ____________

22. In _______ routing, the least cost route between any two nodes is the route with the minimum distance.

23. In ________, each node maintains a vector (table) of minimum distances to every node.

24. In distance vector routing, each node periodically shares its routing table with _________ and whenever there is a change.

25. The Routing Information Protocol (RIP) is an intradomain routing based on _________ routing

26. The metric used by _______ is the hop count

27. The _________ routing uses the Dijkstra algorithm to build a routing table.

28. The Open Shortest Path First (OSPF) protocol is an intradomain routing protocol based on _______ routing

29. The _______ protocol allows the administrator to assign a cost, called the metric, to each route

30. In OSPF, a ________ link connects two routers without any other host or router in between

31. In OSPF, a _______ link is a network with several routers attached to it.

32. In OSPF, a ________ link is a network is connected to only one router.

33. In OSPF, when the link between two routers is broken, the administration may create a _________ link between them using a longer path that probably goes through several routers

34. In ________ routing, we assume that there is one node (or more) in each autonomous system that acts on behalf of the entire autonomous system

35. ______ is an interdomain routing protocol using path vector routing

36. To create a neighborhood relationship, a router running BGP sends an ________ message

37. An area is _______

38. A one-to-all communication between one source and all hosts on a network is classified as a _______ communication.

39. A one-to-many communication between one source and a specific group of hosts is classified as a _______ communication.

40. A one-to-one communication between one source and one destination is classified as a _______ communication.

41. In ______, the router forwards the received packet through only one of its interfaces.

42. In _______, the router may forward the received packet through several of its interfaces

43. Emulation of ________ through ___________ is not efficient and may create long delays.

44. In unicast routing, each router in the domain has a table that defines a ______ path tree to possible destinations

45. In multicast routing, each involved router needs to construct a ________ path tree for each group.

46. In the _______ tree approach, each router needs to have one shortest path tree for each group.

47. In the group-shared tree approach, _________ involved in multicasting

48. Multicast link state routing uses the _______ tree approach

49. The Multicast Open Shortest Path First (MOSPF) protocol is an extension of the OSPF protocol that uses multicast routing to create source-based trees. The protocol is based on _______ routing

50. MOSPF is a _______ protocol

51. _________ broadcasts packets, but creates loops in the systems.

52. In RPF, a router forwards only the copy that has traveled the _______ path from the source to the router.

53. RPF eliminates the ________ in the flooding process

54. RPF guarantees that each network receives only ____ of the multicast packet.

55. RPB creates a shortest path _______ tree from the source to each destination

56. RPB guarantees that each destination receives _________ of the packet

57. In ________, the multicast packet must reach only those networks that have active members for that particular group.

58. ______ adds pruning and grafting to _______ to create a multicast shortest path tree that supports dynamic membership changes

59. _________ is an implementation of multicast distance vector routing. It is a source-based routing protocol, based on RIP.

60. DVMRP is a ________routing protocol, based on RIP

61. Pruning and grafting are strategies used in _______

62. A _______ message tells an upstream router to stop sending multicast messages for a specific group through a specific router.

63. A _______ message tells an upstream router to start sending multicast messages for a specific group through a specific router.

64. CBT is a ________ protocol that uses a core as the root of the tree

65. PIM-DM is used in a _______ multicast environment, such as a LAN.

66. PIM-SM is used in a _______multicast environment such as a WAN.

67. In _______, a logical tunnel is established by encapsulating the multicast packet inside a unicast packet.