多項(xiàng)選擇題

Refer to the graphic. R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem?（）

A.All of the routers need to be configured for backbone Area 1.
B.R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.
C.A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.
D.The hello and dead interval timers are not set to the same values on R1 and R3.
E.EIGRP is also configured on these routers with a lower administrative distance.
F.R1 and R3 are configured in different areas.


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2.單項(xiàng)選擇題VLAN 3 is not yet configured on your switch.What happens if you set the switchport access vlan 3 commmand interface configuration mode?（）

A.The command is accepted and the respective VLAN is added to vlan dat.
B.The command is rejected.
C.The command is accepted and you must configure the VLAN manually.
D.The port turns amber.

3.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

4.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

5.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