單項(xiàng)選擇題In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?()

A.after broken links are re-established
B.in an improperly implemented redundant topology
C.when upper-layer protocols require high reliability
D.during high traffic periods
E.when a dual ring topology is in use


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1.多項(xiàng)選擇題Which router IOS commands can be used to troubleshoot LAN connectivity problems?()

A.ping
B.tracert
C.ipconfig
D.show ip route
E.winipcfg
F.show interfaces

2.單項(xiàng)選擇題

Refer to the exibit .An attempt to deny web access to a subnet blocks all traffic from the subnet.Which interface command immedicately removes the effect of ACL 102?()

A.no ip access-group 102 in
B.no ip access-group 102 out
C.no ip access-list 102 in
D.no ip access-class 102 out
E.no ip access-class 102 in

3.單項(xiàng)選擇題What will happen if a private IP address is assigned to a public interface connected to an ISP?()

A.Addresses in a private range will be not routed on the Internet backbone.
B.Only the ISP router will have the capability to access the public network.
C.The NAT process will be used to translate this address in a valid IP address.
D.Several automated methods will be necessary on the private network.
E.A conflict of IP addresses happens, because other public routers can use the same range.

4.單項(xiàng)選擇題

Refer to the exhibit. Give this output for SwitchC, what should the network administrator's next action be?()

A.Check the trunk encapsulation mode for SwitchC's fa0/1 port.
B.Check the duplex mode for SwitchC's fa0/1 port.
C.Check the duplex mode for SwitchA's fa0/2 port.
D.Check the trunk encapsulation mode for SwitchA's fa0/2 port.

5.單項(xiàng)選擇題

Refer to the exhibit. A network technician is asked to design a small network with redundancy. The exhibit represents this design, with all hosts configured in the same VLAN. What conclusions can be made about this design?()

A.The design will function as intended
B.Spanning-tree will need to be used.
C.The router will not accept the addressing scheme.
D.The connection between switches should be a trunk.
E.The router interfaces must be encapsulated with the 802.1Q protocol.

6.單項(xiàng)選擇題Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802.1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified.What will happen in this scenario?()

A.802.1Q giants frames could saturate the link.
B.VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames.
C.A native VLAN mismatch error message will appear.
D.VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.

7.多項(xiàng)選擇題Host 1 is trying to communicate with Host 2. The e0 interface on Router C is down. Which of the following are true?()

A.Router C will use ICMP to inform Host 1 that Host 2 cannot be reached.
B.Router C will use ICMP to inform Router B that Host 2 cannot be reached.
C.Router C will use ICMP to inform Host 1, Router A, and Router B that Host 2 cannot be reached.
D.Router C will send a Destination Unreachable message type.
E.Router C will send a Router Selection message type.
F.Router C will send a Source Quench message type.

8.單項(xiàng)選擇題When you are troubleshooting an ACL issue on a router,which command can help you to verify which interfaces are affected by the ACL?()

A.show ip access-list
B.show access-list
C.list ip interface
D.show interface
E.show ip interface

9.單項(xiàng)選擇題Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?()

A.BackboneFast
B.UplinkFast
C.Root Guard
D.BPDU Guard
E.BPDU Filter

10.單項(xiàng)選擇題A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem? ()Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

A.The process id is configured improperly
B.The OSPF area is configured improperly
C.The network wildcard mask is configured improperly
D.The network number is configured improperly
E.The AS is configured improperly
F.The network subnet mask is configuerd improperly