McqMate
| 1. |
If a datagram router goes down then ………….. |
| A. | all packets will suffer |
| B. | only those packets which are queued in the router at that time will suffer |
| C. | only those packets which are not queued in the router at that time will suffer |
| Answer» B. only those packets which are queued in the router at that time will suffer | |
| 2. |
In datagram subnet new route is chosen ………………… |
| A. | for every packet sent |
| B. | for all the packet sent |
| C. | only for the first packet |
| Answer» A. for every packet sent | |
| 3. |
For a connection oriented service, we need a …………… |
| A. | virtual circuit subnet |
| B. | short circuit subnet |
| C. | datagram subnet |
| Answer» C. datagram subnet | |
| 4. |
In ………………, each packet of a message follows the same path from sender to receiver. |
| A. | circuit switching |
| B. | message switching |
| C. | virtual approach to packet switching |
| Answer» A. circuit switching | |
| 5. |
A permanent virtual circuit involves …………….. |
| A. | connection establishment |
| B. | data transfer |
| C. | connection release |
| Answer» B. data transfer | |
| 6. |
The set of optimal routes from all sources to a given destination from a tree rooted to the destination is known as …………….. |
| A. | binary tree ( |
| B. | sparse tree |
| C. | sink tree |
| Answer» C. sink tree | |
| 7. |
Adaptive routing algorithms get their information from …………. |
| A. | only from local environment |
| B. | only from adjacent routers |
| C. | from locally, adjacent, external routers |
| Answer» C. from locally, adjacent, external routers | |
| 8. |
In Hierarchical routing for N router subnet, the optimal number of levels is ………….. |
| A. | logn |
| B. | log(n -1) |
| C. | lnn ( |
| Answer» C. lnn ( | |
| 9. |
The router algorithm takes the decision to changes the route when …………….. |
| A. | router changes |
| B. | topology changes |
| C. | user changes |
| Answer» B. topology changes | |
| 10. |
If route from router I to router J is computed on line based on the current statistics, then it is called as ……………….. |
| A. | dynamic routing |
| B. | session routing |
| C. | temporary routing |
| Answer» A. dynamic routing | |
| 11. |
If the subnet uses virtual circuits internally, routing decisions are made only when a new virtual circuit is being setup. This is called as…………….. |
| A. | session routing |
| B. | circuit routing |
| C. | datagram routing |
| Answer» A. session routing | |
| 12. |
…………….. change their routing decisions to reflect changes in the topology. |
| A. | nonadaptive algorithms |
| B. | adaptive algorithms |
| C. | static algorithms |
| Answer» B. adaptive algorithms | |
| 13. |
If router J is on the optimal path from router I to router K, then the optimal path from J to K also falls along the same route is known as ……………….. |
| A. | routing principle |
| B. | optimality principle |
| C. | sink tree principle |
| Answer» B. optimality principle | |
| 14. |
……………. do not base their routing decisions on measurements or estimates of the current traffic and topology. |
| A. | non adaptive algorithms |
| B. | adaptive algorithms |
| C. | static algorithms |
| Answer» A. non adaptive algorithms | |
| 15. |
The method of network routing where every possible path between transmitting and receiving DTE is used is called …………… |
| A. | random routing |
| B. | packet flooding |
| C. | directory routing |
| Answer» B. packet flooding | |
| 16. |
In Hierarchical routing, the routers are divided into what is called as …………….. |
| A. | zones |
| B. | cells |
| C. | regions |
| Answer» C. regions | |
| 17. |
The regions in Hierarchical routing are grouped in to …………….. |
| A. | clusters |
| B. | zones |
| C. | blocks |
| Answer» A. clusters | |
| 18. |
The Clusters in Hierarchical routing are grouped in to ……………… |
| A. | clusters |
| B. | zones |
| C. | blocks |
| Answer» B. zones | |
| 19. |
If a router sends every incoming packet out only on those lines that are going approximately in the right direction is known as …………….. |
| A. | random flooding |
| B. | static flooding |
| C. | selective flooding |
| Answer» C. selective flooding | |
| 20. |
To do multicast routing, each router computes a ………………… |
| A. | binary tree |
| B. | avl tree |
| C. | spanning tree |
| Answer» C. spanning tree | |
| 21. |
In ………………. to send a multicast message a host sends it to the core, which then does the multicast along the spanning tree. |
| A. | core based trees |
| B. | avl trees |
| C. | binary trees |
| Answer» A. core based trees | |
| 22. |
In distance vector routing algorithm, each router maintains a separate routing table with the following entries. |
| A. | preferred input line , estimated time |
| B. | preferred input line, estimated distance |
| C. | preferred output line, estimated time |
| Answer» C. preferred output line, estimated time | |
| 23. |
In distance vector routing algorithm, the routing tables are updated ………………… |
| A. | by exchanging information with the neighbours |
| B. | automatically |
| C. | using the backup database |
| Answer» A. by exchanging information with the neighbours | |
| 24. |
In AODV routing algorithm for MANETs, the route is discovered at time |
| A. | only when the network is established |
| B. | in middle of the transmission |
| C. | when there is a need for route by the host |
| Answer» C. when there is a need for route by the host | |
| 25. |
The processes that keep track of all mobile hosts visiting the area is …………….. |
| A. | home agent |
| B. | mobile agent |
| C. | foreign agent |
| Answer» C. foreign agent | |
| 26. |
The hosts which are basically stationary hosts who move from one fixed site to another from time to time but use the network only when they are physically connected to it are called ……………. |
| A. | migratory hosts |
| B. | stationary hosts |
| C. | mobile hosts |
| Answer» A. migratory hosts | |
| 27. |
The hosts who compute on the run and want to maintain their connections as they move around …………… |
| A. | migratory hosts |
| B. | stationary hosts |
| C. | mobile hosts |
| Answer» C. mobile hosts | |
| 28. |
What is the type of network in which the routers themselves are mobile? |
| A. | wide area network |
| B. | mobile ad hoc network |
| C. | mobile network |
| Answer» B. mobile ad hoc network | |
| 29. |
In open loop congestion control techniques, the decisions are based on the …………… |
| A. | without regard to the current state of the network |
| B. | with regard to the current state of the network |
| C. | with regard to the choice of the host |
| Answer» A. without regard to the current state of the network | |
| 30. |
In closed loop congestion control techniques, the decisions are based on the …………….. |
| A. | concept of a feedback loop |
| B. | concept of a forward loop |
| C. | concept of current state of network |
| Answer» A. concept of a feedback loop | |
| 31. |
..………..is used to validate the identity of the message sender to the recipient |
| A. | encryption |
| B. | decryption |
| C. | digital certificate |
| Answer» C. digital certificate | |
| 32. |
When too many packets are present in the subnet, and performance degrades then it leads to ……………….. |
| A. | ingestion |
| B. | congestion |
| C. | digestion |
| Answer» B. congestion | |
| 33. |
What is it goal of congestion control? |
| A. | making sure that subnet is not able to carry the offered traffic |
| B. | making sure that subnet will allow more than the offered packets |
| C. | making sure that subnet is able to carry the offered traffic |
| Answer» C. making sure that subnet is able to carry the offered traffic | |
| 34. |
The service of open loop congestion control technique is ………………….. |
| A. | monitor the system to detect when and where congestion occurs |
| B. | when to accept new traffic |
| C. | pass the information to places where action can be taken |
| Answer» B. when to accept new traffic | |
| 35. |
In …………… case higher bandwidth can be achieved. |
| A. | connectionless networks |
| B. | connection oriented networks |
| C. | virtual circuit networks |
| Answer» A. connectionless networks | |
| 36. |
In transport layer, End to End delivery is the movement of data from ………………. |
| A. | one station to the next station |
| B. | one network to the other network |
| C. | source to destination |
| Answer» C. source to destination | |
| 37. |
The service of closed loop congestion control technique is ……………… |
| A. | when to accept new traffic |
| B. | when to discard the packets |
| C. | monitor the system to detect when and where congestion occurs |
| Answer» C. monitor the system to detect when and where congestion occurs | |
| 38. |
The solution to increase the capacity when congestion occurs is ………………… |
| A. | denying service to the users |
| B. | degrading the service to the users |
| C. | splitting traffic over multiple routes |
| Answer» C. splitting traffic over multiple routes | |
| 39. |
When the source host receives the choke packet, then the source ……………… |
| A. | reduces the capacity of the line |
| B. | reduces the line utilization factor |
| C. | reduces the traffic generation |
| Answer» C. reduces the traffic generation | |
| 40. |
If the buffer fills and a packet segment is dropped, then dropping all the rest of the segments from that packet, since they will be useless anyway is called ……………….. |
| A. | priority dropping |
| B. | tail dropping |
| C. | age based dropping |
| Answer» B. tail dropping | |
| 41. |
Flow control policy is implemented in …………………. |
| A. | network layer |
| B. | transport layer |
| C. | application layer |
| Answer» B. transport layer | |
| 42. |
For applications such as audio and video streaming, the variation in the packet arrival times is called …………….. |
| A. | random early detection |
| B. | jitter |
| C. | delay difference |
| Answer» B. jitter | |
| 43. |
The first collision free protocol is ………………. |
| A. | binary countdown |
| B. | basic bitmap |
| C. | reservation protocol |
| Answer» B. basic bitmap | |
| 44. |
Sending of a IP packet from host 1 to host 2 where both are of same LAN but the packet is transferred through different intermediate LANs is called ……………… |
| A. | tunnelling |
| B. | routing |
| C. | diverting |
| Answer» A. tunnelling | |
| 45. |
FDDI is an acronym for …………… |
| A. | fast data delivery interface |
| B. | fiber distributed data interface |
| C. | fiber distributed digital interface |
| Answer» B. fiber distributed data interface | |
| 46. |
The address field of a frame in HDLC protocol contains the address of the ……………… station. |
| A. | primary |
| B. | secondary |
| C. | tertiary |
| Answer» B. secondary | |
| 47. |
In ………………. transmission, the channel capacity is shared by both communicating devices at all times. |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| Answer» C. full-duplex | |
| 48. |
Source routing bridges in the same LANs must have …………… bridge Number. |
| A. | same |
| B. | different |
| C. | source |
| Answer» B. different | |
| 49. |
A repeater takes a weakened or corrupted signal and …………… it. |
| A. | amplifies |
| B. | regenerates |
| C. | resample |
| Answer» B. regenerates | |
| 50. |
The PSTN is an example of …………….. network. |
| A. | packet-switched |
| B. | circuit-switched |
| C. | message-switched |
| Answer» B. circuit-switched | |
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