Which device is normally used to translate telephone numbers or names to IP addresses for call routing in an H.323 network？ （）
A: call agent
B: IP phone
C: multipoint control unit
D: gatekeeper
A: call agent
B: IP phone
C: multipoint control unit
D: gatekeeper
举一反三
- The main task of the Internet’s Domain Name System （DNS） is to： A: Translate port numbers to IP addresses B: Provide an authority for registering domain names C: Specify the standards for Internet domain names D: Translate mnemonic（记忆的） names to IP addresses
- Personal information such as names, e-mail addresses, phone numbers and(__)(person) addresses can be leaked online.
- What is true regarding Autonomous Systems （AS ）？（） A: AS numbers are assigned by the IANA B: AS numbers are used by BGP （Border Gateway protocol ） to exchange IP routing information withneighboring AS C: In the internet， an Autonomous System （AS） is a collection of IP networks and routers under the control D: All of the Above
- Of the following names, which one was once used by the Westerners to call ancient China?
- What is stored in the ARP table of the Internet host? ( ) A: IP addresses B: MAC addressses C: the mapping of domain names to IP addressses D: the mapping of IP addresses to MAC addressses