Cisco CCNA 200-301 Questions & Answers

• Question 691:

  Which two statements about NTP operations are true? (Choose two.)

  A. NTP uses UDP over IP.

  B. Cisco routers can act as both NTP authoritative servers and NTP clients.

  C. Cisco routers can act only as NTP servers.

  D. Cisco routers can act only as NTP clients.

  E. NTP uses TCP over IP.

  Correct Answer: AB

  NTP use UDP port 123.

• Question 692:

  Which keyword in a NAT configuration enables the use of one outside IP address for multiple inside hosts?

  A. source

  B. static

  C. pool

  D. overload

  Correct Answer: D

  By adding the keyword "overload" at the end of a NAT statement, NAT becomes PAT (Port Address Translation). This is also a kind of dynamic NAT that maps multiple private IP addresses to a single public IP address (many-to-one) by using different ports. Static NAT and Dynamic NAT both require a one-to-one mapping from the inside local to the inside global address. By using PAT, you can have thousands of users connect to the Internet using only one real global IP address. PAT is the technology that helps us not run out of public IP address on the Internet. This is the most popular type of NAT.

  An example of using "overload" keyword is shown below:

  R1(config)# ip nat inside source list 1 interface ethernet1 overload

• Question 693:

  Which two pieces of information can you learn by viewing the routing table? (Choose two.)

  A. whether an ACL was applied inbound or outbound to an interface

  B. the EIGRP or BGP autonomous system

  C. whether the administrative distance was manually or dynamically configured

  D. which neighbor adjacencies are established

  E. the length of time that a route has been known

  Correct Answer: CD

• Question 694:

  Which two pieces of information can you determine from the output of the show ntp status command? (Choose two.)

  A. whether the NTP peer is statically configured

  B. the IP address of the peer to which the clock is synchronized

  C. the configured NTP servers

  D. whether the clock is synchronized

  E. the NTP version number of the peer

  Correct Answer: BD

  Below is the output of the "show ntp status" command. From this output we learn that R1 has a stratum of 10 and it is getting clock from 10.1.2.1.

  

• Question 695:

  What are two requirements for an HSRP group? (Choose two.)

  A. exactly one active router

  B. one or more standby routers

  C. one or more backup virtual routers

  D. exactly one standby active router

  E. exactly one backup virtual router

  Correct Answer: AB

  Exactly one active router: Only one Active Router per HSRP group will be elected based on highest priority. In case of equal priority, Highest IP address will be elected as Active Router. One or more standby routers: There can be one or more Standby Routers.

• Question 696:

  The OSPF Hello protocol performs which of the following tasks? (Choose two.)

  A. It provides dynamic neighbor discovery.

  B. It detects unreachable neighbors in 90 second intervals.

  C. It maintains neighbor relationships.

  D. It negotiates correctness parameters between neighboring interfaces.

  E. It uses timers to elect the router with the fastest links as the designated router.

  F. It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.

  Correct Answer: AC

• Question 697:

  If all OSPF routers in a single area are configured with the same priority value, what value does a router use for the OSPF router ID in the absence of a loopback interface?

  A. the IP address of the first Fast Ethernet interface

  B. the IP address of the console management interface

  C. the highest IP address among its active interfaces

  D. the lowest IP address among its active interfaces

  E. the priority value until a loopback interface is configured

  Correct Answer: C

• Question 698:

  A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link.

  

  The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?

  A. The OSPF area is not configured properly.

  B. The priority on R1 should be set higher.

  C. The cost on R1 should be set higher.

  D. The hello and dead timers are not configured properly.

  E. A backup designated router needs to be added to the network.

  F. The OSPF process ID numbers must match.

  Correct Answer: D

  In OSPF, the hello and dead intervals must match and here we can see the hello interval is set to 5 on R1 and 10 on R2. The dead interval is also set to 20 on R1 but it is 40 on R2.

• Question 699:

  Refer to the exhibit. Which address and mask combination represents a summary of the routes learned by EIGRP?

  

  A. 192.168.25.0 255.255.255.240

  B. 192.168.25.0 255.255.255.252

  C. 192.168.25.16 255.255.255.240

  D. 192.168.25.16 255.255.255.252

  E. 192.168.25.28 255.255.255.240

  F. 192.168.25.28 255.255.255.252

  Correct Answer: C

  The binary version of 20 is 10100.

  The binary version of 16 is 10000.

  The binary version of 24 is 11000.

  The binary version of 28 is 11100.

  The subnet mask is /28. The mask is 255.255.255.240.

  Note:

  From the output above, EIGRP learned 4 routes and we need to find out the summary of them:

  1.

  192.168.25.16

  2.

  192.168.25.20

  3.

  192.168.25.24

  4.

  192.168.25.28

  -> The increment should be 28 ?16 = 12 but 12 is not an exponentiation of 2; so we must choose 16 (24). Therefore the subnet mask is /28 (=1111 1111.1111 1111.1111 1111.11110000) = 255.255.255.240.

  So the best answer should be 192.168.25.16 255.255.255.240.

• Question 700:

  Refer to the exhibit. C-router is to be used as a "router-on-a-stick" to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?

  

  A. These commands need to be added to the configuration: C-router(config)# router eigrp 123 C-router(config-router)# network 172.19.0.0

  B. These commands need to be added to the configuration: C-router(config)# router ospf 1 C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0

  C. These commands need to be added to the configuration: C-router(config)# router rip C-router(config-router)# network 172.19.0.0

  D. No further routing configuration is required.

  Correct Answer: D

  Since all the same router (C-router) is the default gateway for all three VLANs, all traffic destined to a different VLA will be sent to the C-router. The C-router will have knowledge of all three networks since they will appear as directly connected in the routing table. Since the C-router already knows how to get to all three networks, no routing protocols need to be configured.