Online Access Free GB0-180 Practice Test

The main function of the physical layer is

• A.To be responsible for the physical and electric interface between the user-end equipment and the network-end equipment
• B.To be responsible for error detection and provide the retransfer mechanism of information
• C.To set up and release the connection within the range of the network between the two transmission protocol entities
• D.To provide reliable information transfer mechanism

One router in Beijing displays the following message: traceroute to
Shengzhen(18.26.0.115),30 hops max 1 Beijing.cn 0 ms 0ms 0ms 2 rout1.cn 39 ms 39ms
39ms, which command does the user input on the router( )

• A.[Quidway]host Shengzhen
• B.[Quidway]Telnet Shengzhen
• C.[Quidway]ping Shengzhen
• D.[Quidway]tracert Shengzhen

In the Ethernet, different devices are distinguished according to ( ) address

• A.LLC address
• B.IP address
• C.IPX address
• D.MAC address

The command Standby state-down 5 means ( )

• A.Type 5 standby down status
• B.Active/standby interface changeover can be performed for only 5 times
• C.When the active interface is logic channel, if after calling for five times, it still fails, it will be deemed that the active logic channel is at down state
• D.When the active interface keeps on down state for 5 seconds, it will changeover to the standby interface

In the access control list, the address and mask 168.18.64.0 0.0.3.255 indicates the IP address range of( )

• A.168.18.64.255~168.18.67.255
• B.168.18.64.0~168.18.67.255
• C.168.18.63.0~168.18.64.255
• D.168.18.67.0~168.18.70.255