CCNA系列认证CCNA(200-120)章节练习(2019.03.13)

单项选择题
Which item represents the standard IP ACL?（）
A.access-list 50 deny 192.168.1.1 0.0.0.255
B.access-list 110 permit ip any any
C.access-list 2500 deny tcp any host 192.168.1.1 eq 22
D.access-list 101 deny tcp any host 192.168.1.1
多项选择题
What two statistics appear in show frame-relay map output?（）
A.The number of FECN packets that are received by the router
B.The number of BECN packets that are received by the router.
C.The ip address of the local router
D.The value of the local DLCI
E.The status of the PVC that is configured on the router
多项选择题
the network administrator has been asked to give reasons for moving from ipv4 to ipv6. what are two valid reasons for adopting ipv6 over ipv4?（）
A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration
单项选择题
Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?（）
A.ping address
B.tracert address
C.traceroute address
D.arp address
多项选择题
Refer to the exhibit. The two exhibit devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? （）
A.The Manchester serial address is 10.1.1.1
B.The Manchester serial address is 10.1.1.2
C.这个Manchester路由器串口地址为：10.1.12
D.The London router is a Cisco 2610.
E.The Manchester router is a Cisco 2610.
F.The CDP information was received on port Serial0/0 of the Manchester router.
G.The CDP information was sent by port Serial0/0 of the London Router.
单项选择题
Refer to the exhibit.Based on the exhibited routing table,how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1?（）
A.TherouterwillforwardpacketsfromR3toR2toR1
B.TherouterwillforwardpacketsfromR3toR1
C.TherouterwillforwardpacketsfromR3toR1toR2
D.TherouterwillforwardpacketsfromR3toR2toR1ANDfromR3toR1
多项选择题
Why do large OSPF networks use a hierarchical design?（）
A.to confine network instability to single areas of the network.
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead
单项选择题
What is the first 24 bits in a MAC address called?（）
A. NIC
B. BIA
C. OUI
D. VAI
多项选择题
Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6 scheme?（）
A.statically map IPV4 address to IPV6 addresses
B.configuration IPv4 tunnels between IPV6 islands
C.use DHCPv6 to map IPV4 addresses to IPV6 addresses
D.use proxying and translation to translate IPV6 packets into IPV4 packets
E.configure IPV6 directly
F.enable dual-stack routing
多项选择题
Refer to the exhibit.What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN?（）
A.The number of collision domains would decrease.
B.The number of collision domains would increase.
C.The number of broadcast domains would remain the same.
D.The number of collision domains would remain the same.
E. The number of broadcast domains would increase.