就业课程
认证课程
企业课程8、For which type of connection should a straight-through cable be used?
哪种类型的连接一个直通电缆应使用吗?
A. switch to switch
B. switch to hub
C. switch to router
D. hub to hub
E. router to PC
Answer: C
不同设备用直通线相同设备用交叉线路由器相当于PC switch与hub是同类设备
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访问层使用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
题目考查的其实还是端口安全， 实际上就是允许这个交换只准接一个终端PC。和明显看出答案应该为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
每个正常接口都正常接收和发送BPDU，接终端设备的接口肯定不会收到环路 BPDU， 所以把这个端口设成PostFast，当有环路时自动敞开
