单项选择题

A. They run a spell check on host names to ensure accur……

DNS servers provide what service?（）

A. They run a spell check on host names to ensure accurate routing
B. They convert domain names into IP address
C. Given an IP address,they determine the name of the host that is sought
D. They map individual hosts to their specific IP addresses

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热门试题

单项选择题Which protocol provides a method of sharing VLAN configuration information between two Cisco switch?（）

A. VTP
B. 802.1Q
C. RSTP
D. STP

单项选择题Which spread spectrum technology does the 802.11b standard define for operation?（）

A. IR
B. DSSS
C. FHSS
D. DSSS and FHSS
E. IR, FHSS, and DSSS

单项选择题A cisco router is booting and has just completed the POST process.It is now ready to find and load an IOSimage.what function does the router perform next?（）

A. It checks the configuration register
B. It attempts to boot from a TFTP server
C. It loads the first image file in flash memory
D. It inspects the configuration file in NVRAM for boot instructions

单项选择题Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?（）

A. incorrect bandwidt h configuration
B. incorrect LMI configuration
C. incorrect map statement
D. incorrect IP address

单项选择题Which command enables IPv6 forwarding on a cisco router?（）

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