Computer Networks — Test 3

Correct Answer: C. C. Multicast distance vector routing
Explanation: Multicast distance vector routing uses the multicast routing technique and source based trees. Router uses its own uni-cast routing table and evanescent shortest path trees for forwarding packets instead of exchanging routing table for information.

Correct Answer: A. A. True
Explanation: Distance vector routing uses dynamic routing tables and these routing tables make use of dynamic routing protocols. The routing tables update themselves dynamically, according to the changes in the inter network.

Correct Answer: B. B. Server side programming
Explanation: Cookies were originally designed for server side programming, and at the lowest level, they are implemented as an extension to the HTTP protocol. They were introduced with the intention of providing a better user experience for the websites.

Correct Answer: A. A. /
Explanation: Setting the path of a cookie to “/” gives scoping like that of localStorage and also specifies that the browser must transmit the cookie name and value to the server whenever it requests any web page on the site.

Correct Answer: A. A. True
Explanation: Persistent connections are kept active after completing transaction so that multiple objects can be sent over the same TCP connection.

Correct Answer: A. A. Application layer
Explanation: HTTP is an Application layer protocol used to define how messages are formatted and transmitted through the World Wide Web.

Correct Answer: A. A. Uniform resource identifier
Explanation: The Uniform Resource Identifier is a name and locator for the resource to be located by the HTTP. The URLs and URNs are derived through the identifier.

Correct Answer: B. B. Transmission control protocol
Explanation: HTTP clients perform requests using a TCP connection, because the TCP connection provides a more reliable service. UDP is not a reliable protocol, border gateway protocol is used on top of TCP, while domain host control protocol is a network layer protocol.

Correct Answer: A. A. Multiple HTTP requests are sent on a single TCP connection without waiting for the corresponding responses
Explanation: HTTP pipelining helps the client make multiple requests without having to waiting for each response, thus saving a lot of time and bandwidth for the client.

Correct Answer: B. B. 21
Explanation: FTP server listens on port 21 for connection request whereas port 20 is used for FTP data transfer. Port 22 is used for SSH remote login. Port 23 is used for TELNET.