Cisco CCNA Chapter 4 answers in the second semester, Cisco ccna second semester

Cisco CCNA Chapter 4 answers in the second semester, Cisco ccna second semester

1.

 

2. All the routers running the Distance Vector Routing Protocol have disconnected all power supplies (including spare batteries ). What happens when these routers are reloaded?
	They share all route information stored in NVRAM before the power-off with the directly connected neighbor.
	They will route hello packets to all other routers in the Network to establish a neighbor relationship.
	They will send updates that only contain direct connection routes to their directly connected neighbors.
	They will broadcast their complete route table to all routers in the Network

 

3.

 

4.

 

5. See the figure below. If you are using the RIP routing protocol, which path will the data packet from the 192.168.1.0/24 network reach 10.0.0.0/8 network?
	Router A-> router B-> router C-> router E.
	Router A-> router D-> router E.
	Router A implements load balancing between "router A-> router D-> router E" and "router A-> router B-> router C-> router E.
	The data packet will select the path based on the sequence of arriving at router.

 

6. The figure shows a network configured to use the RIP routing protocol. Router2 detects that the link with Router1 is disconnected. Then it advertises the measurement of the link network as 16 hops. Which routing loop prevention mechanism is used?
	Horizontal segmentation
	Error Condition
	Suppression Timer
	Route poisoning
	Count to infinity

 

7. See the figure below. All routers in the network run RIP. Vroa A does not receive updates from vrob B within three minutes. How will router A respond?
	The suppression timer waits for 60 seconds and then deletes the route from the route table.
	If the update is not received after 180 seconds, the invalid timer marks the route as unavailable.
	The update timer requests updates on the routes learned from vrob B.
	The Hello timer will time out after 10 seconds, and then the route will be cleared from the routing table

 

8. What happens when the connection between a routerinterface and a network 114.125.16.0 is lost? (Select two items .)
	RouterB will include the network 123.92.76.0 and 136.125.85.0 in the update sent to the RouterB.
	During the next update interval, RouterB sends RIP updates containing the inaccessible network from both ports.
	During the next update interval, RouterC will send an update to RouterB, stating that it can jump to the 114.125.16.0 network through 2.
	RouterC will learn from RouterB that it has lost connection with the network 114.125.16.0.
	RouterB will include the network 123.92.76.0 and 136.125.85.0 In the updates sent to RouterC.

 

9.

 

10. Which of the following statements correctly Describe network replication? (Select two items .)
	It can be used for Cisco routers and non-Cisco routers.
	The update will be triggered when the routing information is changed in the topology.
	The infinite measurement of the source image is 16.
	VPC sends some route table updates, including only the changed routes.
	VPN broadcasts updates to all routers in the network.

11. Which of the following statements about the cisco RIP_JITTER variable is true?
	It caches updates when the updates are sent from the router interface to prevent route update synchronization.
	It will subtract the random time period from the next route update interval (the size is 0% to 15% of the specified interval) to prevent route update synchronization.
	It will cause the router to skip every other scheduled update time to prevent route update synchronization.
	It forces the router to listen for other updates on the link before sending its own updates, to prevent route update synchronization.

 

12.

 

13. What measures does the RIP Protocol regard as infinite?
	0
	15
	16
	224
	255

 

14.

 

15. See the figure below. If all routers use RIP, how many rounds of updates will occur before all routers know the entire network?
	1
	2
	3
	4
	5
	6

16. What is the role of the RIP suppression timer?
	Make sure that the measurement of the invalid route is 15
	Vrouters that cause routing loops in the network cannot send any updates.
	Ensure that each new route is valid before sending updates
	Indicates that the router ignores updates that may not be able to access the route within a specified period of time or under a specific event.

 

17. What is a routing loop?
	Data packets are transmitted back and forth between two router interfaces.
	Different paths returned from the destination and the starting path form a "loop ".
	Data packets are constantly transmitted between a series of routers but cannot reach their real destination.
	Distribution of routes from one routing protocol to another

 

18. Which of the following statements about RIP is true?
	It broadcasts updates to all other routers in the network every 60 seconds.
	It uses multicast addresses to send updates to other routers every 90 seconds.
	It sends an update when a link failure occurs.
	The update only contains the route changes since the last update.

 

19. Which of the following situations may occur in a distance vector network without convergence? (Select three items .)
	Routing loop
	Inconsistent traffic forwarding
	No traffic will be forwarded unless the system converges.
	Inconsistent route table entries
	Route table update is sent to the wrong destination

 

20. Which of the following routing protocols are distance vector routing protocols? (Select three items ).
	R00001
	China site
	OSPF
	IS-IS
	R00002