How to answers above questions?
1. Persistent HTTP requires?
a. 2(round trip times) + file transmission time
b. as little as two RTT for all the referenced objects
c. one file transmission time
d. as little as one RTT for all the referenced objects
2. UDP has no connection between client & server?
a. RCVR extracts sender IP address and port
b. sender explicitly attaches IP destination address and port
c. three other answers are incorrect
d. no handshaking before sending data
3. A socket in
a. A combination of IP address and port number, connected by a "/" symbol
b. sender explicitly attaches IP destination address and port
c. RCVR extracts from the socket, sender IP address and port
d. A combination of IP address and port number, connected by a"." symbol
4. The data link layer provides?
a. the functional and procedural means to transfer data between network entities and the means to detect and possibly correct errors that may occur in the link layer.
b. the functional and procedural means to transfer data between network entities and the means to detect and possibly correct errors that may occur in the physical layer.
c. data transfers between adjacent network nodes in a wide area network (WAN) or between nodes on the local area network (LAN) segment
d. the functional and procedural means to transfer data between network entities and the means to detect and possibly correct errors that may occur in the application layer.
e. the functional and procedural means to transfer data between network entities and the means to detect and possibly correct errors that may occur in the transport layer.
5. which of the following might be used by a company to satisfy its growing communications needs?
a. TCP
b. UDP
c. both TCP & UDP
6. non persistent HTTP means?
a. at most three objects are sent over TCP connection, connection and then closed
b. at most one object sent over TCP connection, connection and then closed
c. at most two object sent over TCP connection, connection and then closed
d. multiple object sent over TCP connection, connection and then closed
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