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If you were to set up a VLAN trunk over a Fast Ethernet link on switch R1， which trunk mode would you set the local port to on R1 if you wanted it to respond to requests from its link partner （R2） and become a trunk？ （）
A . Auto
B . Negotiate
C . Designate
D . No negotiate
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小麦的粒色由两对同源染色体上的两对基因R1和r1、R2和r2控制。R1和R2决定红色，r1和r2决定白色（说明R1和R2的遗传效应相同）。麦粒的颜色随R的数量增加而逐渐加深。将红粒（R1R1R2R2）与白粒（r1r1r2r2）杂交得F1，F1自交得F2，则F2的表现型有（）
A . 4种
B . 9种
C . 5种
D . 10种
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You have configured router R1 with HSRP， using the standard defaults. Which three statements are true of a default HSRP configuration？（）
A . The Standby hello time is 2 seconds.
B . Two HSRP groups are configured.
C . The Standby track interface priority is 10.
D . The Standby hold time is 10 seconds
E . The Standby priority is 100.
F . The Standby delay is 3 seconds.
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Two directly connected routers， R1 and R2， are both configured for OSPF graceful restart. R2 is able to switch packets in hardware， but R1 is not. If a network administrator logs on to R2 and performs a system reload， which will be the result？（）
A . Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.
B . R2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed.
C . R2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state.
D . All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
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Routers R1 and R2 use HSRP so that one router will back up the other should there be a failure. Which two statements are true about the Hot Standby Router Protocol （HSRP）？ （）
A . Load sharing with HSRP is achieved by creating multiple subinterfaces on the HSRP routers.
B . Routers configured for HSRP can belong to multiple groups and multiple VLANs.
C . Load sharing with HSRP is achieved by creating HSRP groups on the HSRP routers.
D . All routers configured for HSRP load balancing must be configured with the same priority.
E . Routers configured for HSRP must belong to only one group per HSRP interface.
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If you were to configure an ISL Ethernet trunk between two Cisco switches， named R1 and R2， what would you have to include at the end of the link for the trunk to operate correctly？ （）
A . An identical VTP mode.
B . An identical speed/duplex.
C . An identical trunk negotiation parameter.
D . An identical trunk encapsulation parameter.
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R1 and R2 are switches that communicate via VTP. What is the default VTP advertisement intervals in Catalyst switches that are in server or client mode？（）
A . 30 seconds
B . 5 minutes
C . 1 minute
D . 10 seconds
E . 5 seconds
F . None of the other alternatives apply
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Refer to the exhibit. Routers R1 and R2 are running EIGRP and have converged. On the basis of the information that is presented, which statement is true? （）https://assets.asklib.com/images/image2/2018073011042561240.jpg
A . Both outgoing and incoming routing updates on R1 will be permitted because the d istribute - list 20 out Serial0/0 command cannot be used with association with the outgoing interface.
B . All incoming routing updates from R2 will be suppressed, but the outgoing updates will continue to be sent.
C . Both outgoing and incoming routing up dates on R1 will be stopped because of the passive - interface Serial0/0 configuration statement.
D . All outgoing routing updates from router R1 to router R2 will be suppressed, but the inbound updates will continue to be received.
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Refer to the exhibit. R1 and R2 have been configured to share routing information via EIGRP. What will be the result of the configuration section shown for R2? （）https://assets.asklib.com/images/image2/2018073108583876318.png
A . Any routes learned by R2 from the interface tied to the 172.16.0.0 network will not be advertised to neighbors on the 192.168.2.0 network.
B . Only routes learned by R2 from the interface tied to the 172.16.0.0 network will be advertised to neighbors on the 192.168.2.0 network.
C . Only the 172.16.0.0 network will be advertised to neighbors on the 192.168.2.0 network.
D . All networks, except the 172.16.0.0 network will be advertised to neighbors on the 192.168.2.0 network .
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Router R1, in ASN 11, learns a BGP route from BGP peer R22 in ASN 22. R1 and then uses BGP to advertise the route to R2, also in ASN 11. What ASNs would you see in the BGP table on R2 for this route?（）
A . 22
B . 11
C . 1
D . None
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R1 in ASN 1 with loopback1 address 1.1.1.1 needs to be configured with an iBGP connection to R2 with loopback2 IP address 2.2.2.2. The connection should use the loopbacks. Which o f the following commands is required on R1?（）
A . neighbor 1.1.1.1 remote- as 1
B . neighbor 2.2.2.2 remote- as 2
C . neighbor 2.2.2.2 update - source loopback1
D . neighbor 2.2.2.2 ibgp -multihop 2
E . neighbor 2.2.2.2 ibgp - mode
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Router R1 is configured for HSRP. Which of the following are valid HSRP states on R1？ （）
A . Init
B . Idle
C . Active
D . Standby
E . Established
F . Backu
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You have just purchased a new Cisco 3560 switch running the enhanced IOS and need configure it to be installed in a high availability network. On a 3560 EMI switch， which three types of interfaces can be used to configure HSRP？（）
A . SVI interface
B . Access port
C . EtherChannel port channel
D . Loopback interface
E . Routed port
F . BVI interface
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Refer to the exhibit. What statement is true based upon the configuration of router R1 and router R2？（）https://assets.asklib.com/images/image2/2018073015422145313.jpg
A . Router R2 will become the master for Virtual Router 1， and router R1 will become the backup for Virtual Router 2.
B . Router R1 will become the master for Virtual Router 1， and router R2 will become the backup for Virtual Router 2.
C . Router R1 will become the active virtual gateway.
D . Router R2 will become the active virtual gateway.
E . The hello and hold timers are incompatible with OSPF type 5 LSAs.
F . The hello and hold timers are incompatible with multi-homed BGP.
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Routers R1 and R2 are EIGRP neighbors. R1 has been configured with the eigrp stub connected command. Which of the following is true as a result？（）
A . R1 can learn EIGRP routes from R2, but R2 cannot learn EIGRP routes from R1
B . R1 can send IP packets to R2, but R2 cannot send IP packets to R1
C . R2 no longer learns EIGRP routes from R1 for routes not connected to R1
D . R1 no longer replies to R2's Query messages
E . R2n o longer sends to R1 Query message
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听力原文：M Excuse me, I got this shirt for my birthday and it seems to be missing several buttons. Could I exchange it for another one？
W Yes, of course. Give me the shirt and go choose another one. Do you have the receipt with you？
M No, I don't. As I already told you it was a gift from a friend. He gave it to me last weekend.
W Oh, well then I'm sorry but we cannot exchange your shirt without a receipt.
What does the man want to do？
A．To exchange an item
B．To get a refund
C．To have an item tailored
D．To buy a birthday gift
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S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology shown in the exhibit. Originally, static routes were configured between these routers to successfully route traffic between the attached networks. What will need to be done in order to use RIPv2 in place of the static routes？（）
<img src='https://img2.soutiyun.com/shangxueba/ask/64407001-64410000/64409000/17b75ef15006e963a847746eb8ec9a38.png' />
A.Configure the no ip subnet-zero command on R1, R2, and R3.
B.Dynamic routing protocols such as RIPv2 cannot be used across Frame Relay networks.
C.Configure the S0/0 interface on R1 as two subinterfaces and configure point-to-point links to R2 and R3.
D.Change the 172.16.2.0/25 and 172.16.2.128/25 subnetworks so that at least two bits are borrowed from the last octet.
E.Change the network address configuration to eliminate the discontiguous 172.16.2.0/25 and 172.16.2.128/25 subnetwork.
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Refer to the exhibit. EIGRP is configured with the default configuration on all routers. Auto summariz ation is enabled on routers R2 and R3, but it is disabled on router R1.Which two EIGRP routes will be seen in the routing table of router R3？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/c0432bed5e96b27cf201162a3a16be20.png' />
A. 10.0.0.0/8
B. 172.16.10.0/24
C. 172.16.0.0/24
D. 10.10.10.0/24
E. 172.16.0.0/16
F. 10.10.0.0/16
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R1 is currently advertising prefixes 1.0.0.0/8, 2.0.0.0/8, and 3.0.0.0/8 over its eBGP connection to neighbor 2.2.2.2 (R2). An engineer configures a prefix list (fred) on R1 that permits only 2.0.0.0/8 and then enables the filter with the neighbor R2 prefix- list fred out command. Upon exiting configuration mode, the engineer uses some show commands on R1, but no other commands.Which of the following is true in this case？（）
A. The show ip bgp neighbor 2 .2.2.2 received -routes command lists the three original prefixes.
B. The show ip bgp neighbor 2.2.2.2 advertised - routes command lists the three original prefixes.
C. The show ip bgp neighbor 2.2.2.2 routes command lists the three original prefixes.
D. T he show ip bgp neighbor 2.2.2.2 routes command lists only 2.0.0.0/8.
E. The show ip bgp neighbor 2.2.2.2 advertised - routes command lists only 2.0.0.0/8.
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Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces （respectively), cu
Routers R1 and R2, OSPF neighbors in area 0 over their Fa0/0 interfaces (respectively), currently both successfully use OSPF MD5 authentication. The OSPF configuration includes the area 0 authentication command under the router ospf 1 command.Which of the following commands must have been configur ed on R1‘s Fa0/0 interface？（）
A. ip ospf authentication null
B. ip ospf authentication message - digest
C. ip ospf authentication -key whatever- it - is
D. ip ospf message - digest - key 1 md5 whatever - it - is
E. ip ospf md5 1 key whatever - it - is
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电阻Rl、R2并联的直流电路中，其总电流为I，则R1支路的电流I1=（)。A.I[R2/（R1+R2)]B.I[R1/（R1+ R2)]
电阻Rl、R2并联的直流电路中，其总电流为I，则R1支路的电流I1=()。
A.I[R2/(R1+R2)]
B.I[R1/(R1+ R2)]
C.I
D.I[1/(R1+ R2)]
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已知ARM处理器R1＝0x12345678, R2=0xFF008899，则执行指令AND R0,R1,R2后，寄存器R0＝（）___________________。
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两个电阻R1、R2相并联，它们的等效电阻为R＝R1＋R2/R1*R2。（）
正确
错误
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两个电阻R1和R2并联连接，当R1和R2具有下列数值时，试求并联的等效电阻。①R1=R2=2Ω;②R1=2Ω，R2=0。
