单选题Router R1 currently has no configuration related to IPv6 or IPv4. The following configuration exis ts in a planning document intended to be used to copy/paste into Router R1 to enable EIGRP for IPv6 on interfaces F0/0 and S0/0/0. No other related confi

第1题：

Router R1 uses S0/0 to connect via a T/1 to the Frame Relay servicE. Five PVCs terminate on the serial link. Three PVCs (101, 102, and 103) are configured on subinterface S0/0.1, and one each (104 and 105) are on S0/0 .2 and S0/0.3. The configuration shows no configuration related to EIGRP WAN bandwidth control, and the bandwidth command is not configured at all. Which of the following is true about how IOS tries to limit EIGRP's use of bandwidth on S0/0?（）

• A、R1 limi ts EIGRP to around 250Kbps on DLCI 102
• B、R1 limits EIGRP to around 250Kbps on DLCI 104
• C、R1 limits EIGRP to around 150Kbps on every DLCI
• D、R1 does not limit EIGRP because noWAN bandwidth control has been configured

第2题：

In which Cisco IOS configuration mode is the route distinguisher （RD） configured？（）

• A、R1（config-route-at）#
• B、R1（config-route-map）#
• C、R1（config-it）#
• D、R1（config-vrf）#
• E、R1（config）#
• F、R1（router）#

第3题：

On router R1， which three of the following protocols will be forwarded to a host specified by the "iphelper-address" interface configuration command if the configuration has not been modified by the"ip forward-protocol udp" global configuration command？（）

• A、BOOTP
• B、TFTP
• C、ARP
• D、DNS
• E、proxy-ARP
• F、FTP
• G、CDP

第4题：

Router R1 has been conf igured with an ipv6 route 2000::/64 S0/0/0 64 command.Which of the following does the 64 at the end of the command represent?（）

• A、Metric
• B、Administrative distance
• C、Timeout (seconds)
• D、Prefix length
• E、Interface ID

第5题：

Router R1 currently has no configuration related to IPv6 or IPv4. The following configuration exis ts in a planning document intended to be used to copy/paste into Router R1 to enable EIGRP for IPv6 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 EIGRP for IPv6 on R1 after this configuration has been pasted into R1?（） ipv6 router eigrp 1 ipv6 unicast- routing interface f0/0 ipv6 address 2000::1/64 ipv6 eigrp 1 interface s0/0/0 ipv6 address 2001::/64 eui - 64 ipv6 eigrp 1

• A、EIGRP works on F0/0 and S0/0/0 without further configuration
• B、EIGRP works with the addition of one command: a no shutdown command in EIGRP router configuration modE
• C、EIGRP works with the addition of one command: an eigrp router - id command in EIGRP router configurat ion modE
• D、EIGRP for IPv6 needs at least two more configuration commands before it works on R1

第6题：

You have just completed an OSPF implementation. While executing your verification plan, you determine that R1 is not able to establish full OSPF adjacency with R2. The show ip ospf neighbor comman d output on R1 shows that R2 is stuck in the INIT state. What could be the cause of this problem?（）

• A、DR and BDR election errors between R1 and R2.
• B、The R2 router has not received the OSPF hello packets from the R1 router.
• C、Mismatched interface ma ximum transmission unit (MTU) configuration between the R1 and R2.
• D、Mismatched OSPF hello interval configuration between the R1 and R2
• E、Corrupted LSAs exchanges between the R1 and R2.

第7题：

Router R1 has working interfaces S0/0, S0/1, and S0/2, with IP address/prefix combinations of 10.10.10.1/24, 10.10.11.2/24, and 10.10.12.3/22. R1's configuration includes the command s router eigrp 9 and network 10.0.0.0. The show ip eigrp interfaces command lists S0/0 and S0/1 in the command output, but not S0/2. Which answer gives the reason for the omission？（）

• A、R1 has EIGRP neighbors reachable via S0/0 and  S0/1, but not via S0/2, so it is not included.
• B、S0/2 may currently be in a state other than up/up.
• C、The network 10.0.0.0 command requires the use of mask 255.0.0.0 due to EIGRP being classful by default.
• D、S0/2 may be configured as a passive inter face.

第8题：

Which configuration command removes all log filters currently configured on the ERX Edge Router？（）

• A、 no log here
• B、 no log fields
• C、 no log filters
• D、 no log severity

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第13题：

You administer a network that uses two routers， R1 and R2， configured as an HSRP group to  provide redundancy for the gateway. Router R1 is the active router and has been configured as  follows：   R1#configure terminal   R1（config）#interface fa0/0   R1（config-if）#ip address 10.10.0.5 255.255.255.0   R1（config-if）#standby 1 priority 150   R1（config-if）#standby preempt delay minimum 50   R1（config-if）#standby 1 track interface fa0/2 15   R1（config-if）#standby 1 ip 10.10.0.20   Which of the following describes the effect the standby preempt delay minimum 50 command will  have on router R1？（）

• A、 The HSRP priority for router R1 will increase to 200.
• B、 Router R1 will become the standby router if the priority drops below 50.
• C、 The HSRP priority for router R1 will decrease to 50 points when Fa0/2 goes down.  
• D、 Router R1 will wait 50 seconds before attempting to preempt the active router.

第14题：

An engineer has added the following configuration snippet to an implementation planning document. The configuration will be added to Router R1, whose Fa0/0 interface connects to a LAN to which Routers R2 and R3 also connect. R2 and R3 are already EIGRP neighbors with each of her. Assuming the snippet shows all commands on R1 related to EIGRP authentication, which answer lists an appropriate comment to be made during the implementation plan peer review?（） key chain fred key 3 key - string whehew interface fa0/0 ip authenticat ion key - chain eigrp 9 fred

• A、The configuration is missing one authentication - related configuration command
• B、The configuration is missing two authentication - related configuration commands
• C、Authentication type 9 is not supported; type 5 should be u sed insteaD
• D、The key numbers must begin with key 1, so change the key 3 command to key 1

第15题：

Router R1, an ASBR connected to the Internet and to backbone area 0, has been configured with a default - information originate command. Which of the following is true about the effects of this configuration command?（）

• A、R1 will always create and flood a default route into the OSPF domain.
• B、R1 will create and flood an LSA for prefix/length 0.0. 0.0/0 into the OSPF domain if R1's IP routing table has a route to 0.0.0.0/0.
• C、R1 will set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, regardless of whether R1 has a default route.
• D、R1 w ill set a flag on the LSA for the subnet between itself and one of the ISPs, noting this subnet as a default network, but only if R1 has a route to 0.0.0.0/0.

第16题：

Router R1 has been configured with the commands rout er eigrp 9 and network 172.16.2.0 0.0.0.255, with no other current EIGRP configuration. R1's (working) Fa0/0 interface has been configured with IP address 172.16.2.2/26. R1 has found three EIGRP neighbors reachable via interface Fa0/0, including the rou ter with IP address 172.16.2.20. When the engineer attempts to add the neighbor 172.16.2.20 fa0/0 command in EIGRP configuration mode. Which of the following occurs？（）

• A、Fa0/0 fails
• B、The command is rejecteD
• C、The existing three neighbors fail
• D、The neighborship with 172.16.2.20 fails and then reestablishes
• E、None of the other answers is correct

第17题：

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 RIPng and IPv6 on interfaces F0/0 and S0/0/0. No other related configuration exists. Which of the following is true about RIPng on R1 after this configuration has been pasted into R1?（） ipv6 unicast- routing interface f0/0 ipv6 rip one enable ipv6 address 2000::1/64 interface s0/0/0 ipv6 address 2001::/64 eui - 64 ipv6 rip one enable

• A、RIPng will be enabled on no interfaces.
• B、RIPng will be enabled on one interface.
• C、RIPng will  be enabled on two interfaces.
• D、RIPng will advertise about prefixes connected to S0/0/0 and F0/0, but only send Updates on one interface.

第18题：

When an IPv6 enabled host boots, it sends a router solicitation (RS) message. An IPv6 router responds with a router advertisement (RA). Which two items are c ontained in the RA?（）

• A、any route advertisements it has received
• B、prefixes for the link
• C、keepalive timers
• D、IPv6 address for the host
• E、request for the local host IP address
• F、lifetime of the prefix

第19题：

Router R1 exists in an Enterprise that uses EIGRP as its routing protocol. The show ip route command output on router R1 lists the following phrase: "Gateway of last resort is 1.1.1.1 to network 2.0.0.0". Whic h of the following is most likely to have caused this output to occur on R1?（）

• A、R1 has been configured with an ip default- network 2.0.0.0 command.
• B、R1 has been configured with an ip route 0.0.0.0 0.0.0.0 1.1.1.1 command.
• C、R1 has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.
• D、Another router has been configured with an ip default - network 2.0.0.0 command.
• E、Another router has been configured with an ip route 2.0.0.0 255.0.0.0 1.1.1.1 command.

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