Question: 20. how to map between IP address and name, and vice versa? LOR A. Domain Name System (DNS) B. IMAP provider retrieval C. Name server

20. how to map between IP address and name, and vice versa? LOR A. Domain Name System (DNS) B. IMAP provider retrieval C. Name server aliasing D. Distributed database 21.responsible for.edu: A. authoritative domain servers B. Top-Level Domain (TLD) servers C. Local ISP D. Name resolution 22.File distribution time, which option is wrong? A. time to send one copy: F/us B. min client download time: F/dmin C. dmin = min server download rate D. time to send N copies: NF/us 23.which option is correct? A. Transport layer provides logical communication between application processes running on different hosts B. receiver: breaks application messages into segments, passes to network layer C. sender: reassembles segments into messages, passes to application layer D. three transport protocols available to Internet applications: TCP, UDP, HTTP 24.use header info to deliver received segments to correct socket: A. multitasking at receiver B. multiplexing at receiver C. demultiplexing at receiver D. demultiplexing at host
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