Cisco 642-902 Actual Free Exam Questions & Community Discussion
Refer to the exhibit. Router C was configured so that it could form an adjacency with three OSPF neighbors, one connected to each of its three physical interfaces.
Which statement is correct about router C?
Which statement is correct about router C?
Correct Answer: C
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
To enable BGP tunneling over an IPv4 backbone, the IPv4 address 192.168.30.1 is converted into a valid IPv6 address. Which three IPv6 addresses are acceptable formats for the IPv4 address? (Choose three.)
Correct Answer: A,C,F
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
ACME Rocket Sleds is growing, and so is their network. They have determined that they can no longer continue using static routes and must implement a dynamic routing protocol. They want to have data use multiple paths to the destinations, even if the paths are not equal cost. Which routing protocol has the ability to do this?
Correct Answer: C
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Using the rules for IPv6 addressing, how can the address 2031:0000:240F:0000:0000:09C0:123A:121B be rewritten?
Correct Answer: A
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
When configuring EIGRP to run across a 56 Kbps serial PPP link, what command do you need to put under the serial interface ensure proper convergence of EIGRP routes?
Correct Answer: A
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Study the exhibit below carefully.
In order to summarize all routes from area 0 to area 1, what must be configured on the router?
In order to summarize all routes from area 0 to area 1, what must be configured on the router?
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
CORRECT TEXT
(OSPF Sim) OSPF is configured on routers Amani and Lynaic. Amani's S0/0 interface and Lynaic's S0/1 interface are in Area 0. Lynaic's Loopback0 interface is in Area 2.
Your task is to configure the following:
Portland's S0/0 interface in Area 1
Amani's S0/1 interface in Area 1
Use the appropriate mask such that ONLY Portland's S0/0 and Amnani's S0/1 could be in Area 1.
Area 1 should not receive any external or inter-area routes (except the default route).
(OSPF Sim) OSPF is configured on routers Amani and Lynaic. Amani's S0/0 interface and Lynaic's S0/1 interface are in Area 0. Lynaic's Loopback0 interface is in Area 2.
Your task is to configure the following:
Portland's S0/0 interface in Area 1
Amani's S0/1 interface in Area 1
Use the appropriate mask such that ONLY Portland's S0/0 and Amnani's S0/1 could be in Area 1.
Area 1 should not receive any external or inter-area routes (except the default route).
Correct Answer:
First, we configure Portland's S0/0 interface so that it belongs to Area 1. So, we have to
find out which subnetwork the IP address 192.168.4.5/30 (the IP of interface S0/0 of Portland)
belongs to. This address belongs to a subnetwork which has:
Increment: 4 (/30 = 255.255.255.252 or 1111 1111.1111 1111.1111 1111.1111 1100)
Network address: 192.168.4.4 (because 4 = 4 * 1 and 4 < 5)
Broadcast address: 192.168.4.7 (because 7 = 4 + 4 - 1) (It is not necessary to find out the
broadcast address but we should know it)
The question requires that only Portland's S0/0 and Amani's S0/1 could be in Area 1, therefore we
must use a wildcard of 0.0.0.3 (this wildcard is equivalent with a subnet mask of /30) so that there
are only 2 IP addresses can participate in area 1 (they are 192.168.4.5 & 192.168.4.6). The full
command we use here is network 192.168.4.4 0.0.0.3 area 1 The question also requires that
"Area 1 should not receive any external or inter-area routes (except the default route)". Recall that
if we don't want the router to receive external routes, we have to stop LSA Type 5. And if we don't
want to receive inter-area routes, we have to stop LSA Type 3 and Type 4. Therefore we have to
configure area 1 as a totally stubby area. For your information, here is the definition of a totally
stubby areA. "Totally stubb area - This area does not accept summary LSAs from other areas
(types 3 or 4) or external summary LSAs (Type 5). Types 3,4 and 5 LSAs are replaced by the Area
Border Router(ABR) with a default router. Totally stubby areas protect internal routers by
minimizing the routing table and summarizing everything outside the area with a default route."
(CCNP BSCI Official Exam Certification Guide, Fourth Edition) In conclusion, we have to configure
area 1 as a totally stubby area. We do that by configuring Portland as stub and configuring Amani
(ABR router) as a stub + "no-summary"suffix. + Configure Portland router as a stub:
Portland#configure terminal
Portland(config)#router ospf 1
Allow network 192.168.4.4/30 to join Area 1, notice that you have to convert subnet mask into wildcard mask:
Portland(config-router)#network 192.168.4.4 0.0.0.3 area 1
Configure Portland as a stub:
Portland(config-router)#area 1 stub
Portland(config-router)#end
Portland#copy running-config startup-config
+ Configure Amani router as a "totally stub":
Amani#configure terminal
Amani(config)#router ospf 1
Amani(config-router)#network 192.168.4.4 0.0.0.3 area 1
Make area 1 become a totally stubby area, notice that we can only use this command on ABR router:
Amani(config-router)#area 1 stub no-summary
Amani(config-router)#end
Amani#copy running-config startup-config
find out which subnetwork the IP address 192.168.4.5/30 (the IP of interface S0/0 of Portland)
belongs to. This address belongs to a subnetwork which has:
Increment: 4 (/30 = 255.255.255.252 or 1111 1111.1111 1111.1111 1111.1111 1100)
Network address: 192.168.4.4 (because 4 = 4 * 1 and 4 < 5)
Broadcast address: 192.168.4.7 (because 7 = 4 + 4 - 1) (It is not necessary to find out the
broadcast address but we should know it)
The question requires that only Portland's S0/0 and Amani's S0/1 could be in Area 1, therefore we
must use a wildcard of 0.0.0.3 (this wildcard is equivalent with a subnet mask of /30) so that there
are only 2 IP addresses can participate in area 1 (they are 192.168.4.5 & 192.168.4.6). The full
command we use here is network 192.168.4.4 0.0.0.3 area 1 The question also requires that
"Area 1 should not receive any external or inter-area routes (except the default route)". Recall that
if we don't want the router to receive external routes, we have to stop LSA Type 5. And if we don't
want to receive inter-area routes, we have to stop LSA Type 3 and Type 4. Therefore we have to
configure area 1 as a totally stubby area. For your information, here is the definition of a totally
stubby areA. "Totally stubb area - This area does not accept summary LSAs from other areas
(types 3 or 4) or external summary LSAs (Type 5). Types 3,4 and 5 LSAs are replaced by the Area
Border Router(ABR) with a default router. Totally stubby areas protect internal routers by
minimizing the routing table and summarizing everything outside the area with a default route."
(CCNP BSCI Official Exam Certification Guide, Fourth Edition) In conclusion, we have to configure
area 1 as a totally stubby area. We do that by configuring Portland as stub and configuring Amani
(ABR router) as a stub + "no-summary"suffix. + Configure Portland router as a stub:
Portland#configure terminal
Portland(config)#router ospf 1
Allow network 192.168.4.4/30 to join Area 1, notice that you have to convert subnet mask into wildcard mask:
Portland(config-router)#network 192.168.4.4 0.0.0.3 area 1
Configure Portland as a stub:
Portland(config-router)#area 1 stub
Portland(config-router)#end
Portland#copy running-config startup-config
+ Configure Amani router as a "totally stub":
Amani#configure terminal
Amani(config)#router ospf 1
Amani(config-router)#network 192.168.4.4 0.0.0.3 area 1
Make area 1 become a totally stubby area, notice that we can only use this command on ABR router:
Amani(config-router)#area 1 stub no-summary
Amani(config-router)#end
Amani#copy running-config startup-config
An IPv6 overlay tunnel is required to communicate with isolated IPv6 networks across an IPv4 infrastructure. There are currently five IPv6 overlay tunnel types. Which three IPv6 overlay tunnel statements are true? (Choose three.)
Correct Answer: A,C,E
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Refer to the exhibit. What two statements are true? (Choose two.)
Correct Answer: A,D
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Which two types of routes will be advertised with the EIGRP configuration as shown?
(Choose two.)
router eigrp 100
network 10.0.0.0
eigrp stub
(Choose two.)
router eigrp 100
network 10.0.0.0
eigrp stub
Correct Answer: B,F
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Based on the exhibited output, which three statements are true? (Choose three.)
Correct Answer: A,C,E
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
What is IPv6 router solicitation?
Correct Answer: C
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
Based on the P1R3 show ip bgp output, which statement is true?
Correct Answer: B
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?
Correct Answer: A
Vote an answer
Explanation: Only visible for EduDump members. You can sign-up / login (it's free).
0
0
0
10