CCNA系列認(rèn)證章節(jié)練習(xí)(2019.12.01)

A. ipv6 host
B. ipv6 unicast-routing
C. ipv6 local
D. ipv6 neighbor

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.

A.16
B.2
C.unlimited
D.4

A. Switch(config-if)# vlan all
B. Switch(config-if)# switchport trunk encapsulation dot1q
C. Switch(config-if)# switchport access vlan all
D. Switch(config-if)# switchport mode trunk
E. Switch(config-if)# switchport access vlan 303

A.所有的路由器會參照自己的拓?fù)鋽?shù)據(jù)庫，看它們是否有到192.168.1.0的備份路由。
B.R2和R3會標(biāo)記到192.168.1.0的路由為不可用，并且不會從R1接受更新直到它們的抑制定時器超時
C.由于水平分割原則，R2不會向R1發(fā)送關(guān)于去往192.168.1.0網(wǎng)段的錯誤信息
D.當(dāng)R2從R1那里學(xué)到192.168.1.0網(wǎng)段不可達(dá)時，R2把去往192.168.1.0網(wǎng)段的度量值設(shè)置為無限大，并向R1發(fā)送回應(yīng)消息。
E.R1將會發(fā)送LSA給R2和R3通知它們網(wǎng)絡(luò)的變化情況，然后所有的路由器周期性的遞增的發(fā)送更新直到網(wǎng)絡(luò)收斂。

A.分組層
B.數(shù)據(jù)鏈路層
C.物理層
D.傳輸層
E.網(wǎng)絡(luò)層

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

A.A級5沒有設(shè)置口令
B.該VTY口令丟失
C.控制臺密碼丟失
D.一個ACL阻止Telnet訪問

A.It converges quickly.
B.OSPF is a classful routing protocol.
C.It uses cost to determine the best route.
D.It uses the DUAL algorithm to determine the best route.
E.OSPF routers send the complete routing table to all directly attached routers.
F.OSPF routers discover neighbors before exchanging routing information.

A.level 0
B.level 1
C.level 4
D.level 7