就業(yè)課程
認證課程
企業(yè)課程8、For which type of connection should a straight-through cable be used?
哪種類型的連接一個直通電纜應(yīng)使用嗎?
A. switch to switch
B. switch to hub
C. switch to router
D. hub to hub
E. router to PC
Answer: C
不同設(shè)備用直通線相同設(shè)備用交叉線路由器相當(dāng)于PC switch與hub是同類設(shè)備
9、Which set of commands is recommended to prevent the use of a hub in the access layer?
什么命令可以阻止在訪問層使用HUB ?
A. switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security maximum 1
B. switch(config-if)#switchport mode trunk
switch(config-if)#switchport port-security mac-address 1
C. switch(config-if)#switchport mode access
switch(config-if)#switchport port-security maximum 1
D. switch(config-if)#switchport mode access
switch(config-if)#switchport port-security mac-address 1
Answer: C
題目考查的其實還是端口安全， 實際上就是允許這個交換只準接一個終端PC。和明顯看出答案應(yīng)該為C
10、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
Answer: D
每個正常接口都正常接收和發(fā)送BPDU，接終端設(shè)備的接口肯定不會收到環(huán)路 BPDU， 所以把這個端口設(shè)成PostFast，當(dāng)有環(huán)路時自動敞開
