Networking Basics Questions and Answers

Answer: A

Correct answer: RFC

The Internet Engineering Task Force publishes its standards as Requests for Comments, numbered sequentially and never revised once issued - a change means a new RFC that obsoletes the old one. The name survives from the deliberately informal beginnings of the series in 1969, though an RFC on the standards track is now a formal specification. RFC 791 defines IP, RFC 793 TCP.

Answer: B

Correct answer: Multipoint

In a multipoint, or multidrop, connection more than two devices share a single link, so the capacity is shared - spatially if they can transmit at once, or in time if they must take turns. A point-to-point connection dedicates the whole link to two devices. Simplex describes the direction of flow rather than the number of devices, so it answers a different question altogether.

Answer: C

Correct answer: So different networks could communicate.

The OSI reference model was produced by ISO to allow equipment from different manufacturers, running different proprietary protocol stacks, to interoperate. Dividing the problem into seven layers with defined interfaces means each layer can be implemented independently, and a change at one layer need not disturb the others. It is a reference model rather than a protocol suite, and it long predates any single vendor’s use of it.

Answer: C

Correct answer: Breaks up broadcast domains in a layer 2 switch internetwork.

A switch by itself puts every port in one broadcast domain. Assigning ports to different VLANs divides them into separate broadcast domains within the same physical switch, so a broadcast in one VLAN is never seen in another, and traffic between VLANs requires a router or a layer 3 switch. Each port already has its own collision domain, VLAN or not; that is what makes it a switch.

Answer: A

Correct answer: erase startup

The startup configuration is what lives in NVRAM, so erase startup-config - abbreviated erase startup - clears it, and the router boots into setup mode next time unless a new configuration is saved first. The running configuration in RAM is untouched, so the router carries on with its current settings until it reloads. erase nvram and delete nvram are not IOS commands.

Answer: D

Correct answer: ARPANET

ARPANET, funded by the United States Advanced Research Projects Agency, carried its first message in 1969 between UCLA and Stanford Research Institute and is the direct ancestor of the Internet. It pioneered packet switching in practice and, in 1983, the adoption of TCP/IP. NSFNET came later, in 1985, as the academic backbone that succeeded it.

Answer: A

Explanation: Each layer adds its own header to the packet from the previous layer. For example, in the Internet layer, the IP header is added over the TCP header on the data packet that came from the transport layer.

Answer: C

Correct answer: router

A router forwards packets between different networks by reading the destination address in the network layer header and consulting its routing table for the best path. A bridge works at the data link layer, forwarding frames within one network on MAC addresses, and a firewall filters traffic against a policy rather than choosing routes for it. Only the router makes forwarding decisions from routing information carried in the packet.

Answer: B

Explanation: A Computer network is defined as a collection of interconnected computers which uses a single technology for connection.
A distributed system is also the same as computer network but the main difference is that the whole collection of computers appears to its users as a single coherent system.
Example:- World wide web

Answer: C

Explanation: A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. They make use of routing protocols like RIP to find the cheapest path to the destination.