In a lab, R1 connects to R2, which connects to R3. R1 and R2 each have several working interfaces, all assigned addresses in class A network 10.0.0.0. Router R3 has some working interfaces in class A net work 10.0.0.0, and others in class B network 172.16.0.0. The engineer experiments with the auto -summary command on R2 and R3, enabling and disabling the command in various combinations.
Which of the following combinations will result in R1 seeing a rout e for 172.16.0.0/16, instead of the individual subnets of class B network 172.16.0.0?（）
A. auto - summary on R2 and no auto - summary on R3
B. auto - summary on R2 and auto - summary on R3
C. no auto -summary on R2 and no auto- summary on R3
D. no auto - summary on R2 and auto - summary on R3
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R1 has 5 working interfaces, with EIGRP neighbors existing off each interface. R1 has routes for subnets 10.1.1.0/24, 10.1.2.0/24, and 10.1.3.0/24, with EIGRP integer metrics of roughly 1 million, 2 million, a nd 3 million, respectively. An engineer then adds the ip summary - address eigrp 1 10.1.0.0 255.255.0.0 command to interface Fa0/0.
Which of the following is true?（）
A. R1 loses and then reestablishes neighborships with all neighbors.
B. R1 no longer advert ises 10.1.1.0/24 to neighbors connected to Fa0/0.
C. 1 advertises a 10.1.0.0/16 route out Fa0/0, with metric of around 3 million (largest metric of component subnets).
D. R1 advertises a 10.1.0.0/16 route out Fa0/0,with metric of around 2 million (med ian metric of component subnets).
A. 10.1.0.0 255.255.192.0
B. 10.1.64.0 255.255.192.0
C. 10.1.100.0 255.255.255.0
D. 10.1.98.0 255.255.252.0
An engineer has typed four different single - line prefix lists in a word processor. The four answers show the four different single -lin e prefix lists. The engineer then does a copy/paste of the configuration into a router.
Which of the lists could match a subnet whose prefix length is 27?（）
A. ip prefix - list fred permit 10.0.0.0/24 ge 16 le 28
B. ip prefix - list barney permit 10.0.0.0/24 le 28
C. ip prefix - list wilma permit 10.0.0.0/24 ge 25
D. ip prefix - list betty permit 10.0.0.0/24 ge 28
R1 has correctly configured EIGRP to filter routes using a route map named question. The configuration that follows shows the entire route map and related configuration. Which of the following is true regarding the filtering action on prefix 10.10.10.0/24 in this case?（）
route - map question deny 10
match ip address 1
route - map question permit 20
match ip address prefix- list fred
!
access - list 1 deny 10.10.10.0 0.0.0.255
ip prefix - list fred permit 10.10.10.0/23 le 25
A. It will be filtered due to the deny action in route map clause 10
B. It will be allowed because of the double negative (two deny references) in clause 10
C. It will be permitted due to matching clause 20's reference to prefix - list freD
D. It will be filtered due to matching the implied deny all route map clause at the end of the route map
The command output that follows was gathered from router R1. If correctly referenced by an EIGRP distribution list that filters outbound Updates, which of the following statements is true about the filtering of various prefixes by this Prefix list?（）
R1#sh ip prefix - list
ip prefix - list question: 4 entries
seq 5 deny 10.1.2.0/24 ge 25 le 27
seq 15 deny 10.2.0.0/16 ge 30 le 30
se q 20 permit 0.0.0.0/0
A. Prefix 10.1.2.0/24 will be filtered due to clause 5
B. Prefix 10.1.2.224/26 will be filtered due to clause 5
C. Prefix 10.2.2.4/30 will be filtered due to clause 15
D. Prefix 10.0.0.0/8 will be permitteD
E. Prefix 0.0.0.0/ 0 will be permitteD
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Which of the following IPv6 tunneling mechanisms support IPv6 IGP routing protocols?（）
Router R1 currently has no configuration related to IPv6 or IPv4. The following configuration exists in a planning document, intended to be used to copy/paste into Router R1 to enable OSPFv3 on interfaces F0/0 and S0/0/0. No other related configuration exists. Assuming F0/0 and S0/0/0 reach an up/up state, which of the following is true about OSPFv3 on R1 after this configuration has been pasted into R1?（）ipv6 router ospf 1ipv6 unicast- routinginterface f0/0ipv6 address 2000 ::1/64ipv6 ospf 1 area 1interface s0/0/0ipv6 address 2001::/64 eui - 64ipv6 ospf 1 area 0
Router R1 use s MAC address 1111.1111.1111 for its Fa0/0 interface. An engineer sees the following configuration in the output of a show running - config command. Then, the engineer issues a show ipv6 interface brief command. What global unicast IPv6 address does this c ommand display for interface tunnel 1?（）interface loopback 1ip address 192.168.1.1 255.255.255.255interface tunnel 1tunnel source loopback 1tunnel destination 192.168.1.2tunnel mode ipv6ip isatapipv6 address 2000::/64 eui - 64
The following output on Router R1 lists details of a BGP route for 190.1.0.0/16. Which of the following is true based on this output?（）R1# show ip bgp 19 0.1.0.0/16BGP routing table entry for 190.1.0.0/16, version 121Paths: (1 available, best #1, table Default - IP - Routing - Table)Advertised to update - groups:11 2 3 41.1.1.1 from 2.2.2.2 (3.3.3.3)Origin IGP, metric 0, localpref 100, valid, internal, best
An enterprise h as plans to start adding IPv6 support. For the first year, the IPv6 will be in small pockets spread around the existing large IPv4 network, with occasional IPv6 traffic while applications teams test IPv6 - enabled servers and applications.Which of the fol lowing tools would be most appropriate?（）
An ISP has assigned prefix 3000:1234:5678::/48 to Company1. Which of the following terms would typically be used to describe this type of public IPv6 prefix?（）
Router R1 connects to Router R2 over an Ethernet LAN with both routers using their F0/0 interfaces. R1 learns a route from R2 using EIGRP f or IPv6. That route lists F0/0 as the outgoing interface with R2 as the next hop. The configuration excerpt shows all relevant configuration on R2's F0/0 interface. Which of the following is true about R1's route?（）interface f0/0mac - address 1111.1111.1 111ipv6 address 2000::/64 eui - 64ipv6 address 2001::1/64
A client host uses IPv4 to communicate with one ser ver and IPv6 to communicate with another.Which of the following IPv6 coexistence features is likely at work on the host?（）
Which of the following answers lists either a protocol or function that can be used by a host to dynamically learn its own IPv6 address?（）
Router R1, a branch router, connects to the Internet using DSL. The engineer plans to use a configuration with a dialer interface. The answers list a feature and interface on which the feature could be configured.Which combinations accurately describe the interface under which a feature will be configured?（）