Hub4TechTop CCNA Interview Questions and Answers

Answer:Routing is the process of finding a path on which data can pass from source to destination. Routing is done by a device called routers, which are network layer devices.

Question: 1 What is Routing?

Answer:This might seem like a basic question, but the interviewer might ask it just to see if you know the basics. Routing is done by routers. Routers have a routing table that send network traffic from one location to another location or segment on the network. Routers reduce network traffic compared to regular hubs. When a user sends network traffic across the network, a hub broadcasts to all segments of the network. With a router, the device analyzes the TCP/IP packet, sees the destination location, and then uses its lookup table to route the packet to the right network segment and destination. Switches also route traffic in a similar fashion.

Question: 2 What is routing on a network?

Answer:Growing networks start to suffer from network congestion. When you segment the network, routers are better able to route traffic to specific parts of the network without broadcasting signals across only one segment. When you reduce broadcasting, you lower congestion, which speeds up your network. With a growing large network, it’s better to start segmenting the network and create subnet masks for different segments.

Question: 3 Is it better to add a network segment to a growing network or continue to use the same subnet mask?

With all of the streaming applications and peer to peer software, network congestion is common on a large network. Network congestion occurs when too many people are trying to use limited bandwidth. Most companies have a limited amount of bandwidth they can use before they pay extra, which is why companies limit bandwidth by blocking streaming and peer to peer applications using firewalls.

Question: 4 What is network congestion?

Answer:User Mode is used for regular task when using a CISCO router, such as to view system information, connecting to remote devices, and checking the status of the router. On the other hand, privileged mode includes all options that are available for User Mode, plus more. You can use this mode in order to make configurations on the router, including making tests and debugging.

Question: 5Differentiate User Mode from Privileged Mode

Answer:Data packets are the encapsulation units that transmit information across a network. A data packet contains the sender’s information, the recipient’s information, and the data contained. It also contains the numeric identification number that defines the order and packet number. When you send data across the network, that information is segmented into data packets. The recipient then puts these packets together to be able to read the information. Basically, data packets contain the information and routing configurations for your transferred message.

Question: 6What are data packets?

Answer:When a switch receives a signal, it creates a frame out of the bits that was extracted from that signal. With this process, it gains access and reads the destination address, after which it forwards that frame to the appropriate port. This is a very efficient means of data transmission, instead of broadcasting it on all ports.

Question: 7What is the key advantage of using switches?

Answer:When you send traffic on a network, the router (default gateway in Windows computer terminology) determines how to route the traffic. RIP determines where to send the traffic by determining the shortest amount of “hops.” A hop is the next router in the traffic’s path. Each router is considered a hop. With IGRP, several more factors are considered. IGRP takes into consideration the bandwidth availability, MTU, reliability and the amount of hops.

Question: 8What is the difference between RIP and IGRP?

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