- Home
- Networking
- CCNA Routing and Switching 200-105
51.
Routers R1 and R2 attach to the same VLAN with IP addresses 10.0.0.1 and 10.0.0.2,
respectively. R1 is configured with the commands router eigrp 99 and network
10.0.0.0. Which of the following commands might be part of a working EIGRP configuration on R2 that ensures that the two routers become neighbors and exchange routes? (Choose two answers.)
- A.network 10
- B.network 10.0.0.1 0.0.0.0
- C.network 10.0.0.2 0.0.0.0
- D.network 10.0.0.0
- Answer & Explanation
- Report
Answer : [C and D]
Explanation :
Explanation :
| The EIGRP network 10.0.0.2 0.0.0.0 command exactly matches the interface with address 10.0.0.2 because of the wildcard mask, enabling EIGRP on that interface. The EIGRP ASN value must match on both routers. The network 10.0.0.1 0.0.0.0 command exactly matches the address on R1, but the network command needs to match addresses on the local router, and these commands should exist on Router R2. The network 10 command is syntactically incorrect; the entire classful network must be configured. |
52.
In the show ip route command, what code designation implies that a route was
learned with EIGRP?
- A.E
- B.I
- C.G
- D.D
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| RIP uses R, and OSPF uses O, but EIGRP uses D. The letter E was already in use by an old (and no longer used) routing protocol, so Cisco chose to use nearby letter D for EIGRP. |
53.
Examine the following excerpt from a show command on Router R1:
EIGRP-IPv4 Neighbors for AS(1) H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 1 10.1.4.3 Se0/0/1 13 00:05:49 2 100 0 29 0 10.1.5.2 Se0/0/0 12 00:05:49 2 100 0 39Which of the following answers is true about this router based on this output?
- A.Address 10.1.4.3 identifies a working neighbor based on that neighbor’s current EIGRP router ID.
- B.Address 10.1.5.2 identifies a router that may or may not become an EIGRP neighbor at some point after both routers check all neighbor requirements.
- C.Address 10.1.5.2 identifies a working neighbor based on that neighbor’s interface IP address on the link between R1 and that neighbor.
- D.Address 10.1.4.3 identifies R1's own IP address on interface S0/0/1.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The output from the show ip eigrp neighbors command lists EIGRP neighbors. The command lists only routers that have passed all EIGRP neighbor checks. The Address column identifies the neighbor based on the neighbor’s interface IP address on their common link, not based on the neighbor’s EIGRP router ID. |
54.
Examine the following except from a router’s CLI:
P 10.1.1.0/24, 1 successors, FD is 2172416 via 10.1.6.3 (2172416/28160), Serial0/1 via 10.1.4.2 (2684416/2284156), Serial0/0 via 10.1.5.4 (2684416/2165432), Serial1/0Which of the following identifies a next-hop IP address on a feasible successor route?
- A.10.1.6.3
- B.10.1.4.2
- C.10.1.5.4
- D.It cannot be determined from this command output.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The first number in parentheses is the computed metric for a route, and the second number is the reported distance (RD) for the route. The route through 10.1.6.3 is the successor route, because the first number in parentheses on this line matches the feasible distance (FD) on the first line. For the other two routes, only the third route’s RD is less than the feasible distance (the metric of the successor route), making this route, with next-hop address 10.1.5.4, a feasible successor route. |
55.
Router R1's EIGRP process knows of three possible routes to subnet 1. One route is
a successor, and one is a feasible successor. R1 is not using the variance command
to allow for unequal-cost load balancing. Which of the following commands shows
information about the feasible successor route, including its metric, whether as
EIGRP topology information or as an IPv4 route?
- A.show ip eigrp topology
- B.show ip eigrp database
- C.show ip route eigrp
- D.show ip eigrp interfaces
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| By definition, the successor route is the best route to reach a subnet, and is the one route EIGRP always puts in the IP routing table. So, the show ip route eigrp command lists this route, including the metric. The show ip eigrp topology command lists both successor and feasible successor routes, including their metrics. The show ip eigrp interfaces command does not list route information, and the show ip eigrp database command is not a valid IOS command. |
|
|
||||||||||||||||||||||||||||
