单项选择题
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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相关考题
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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
