Cable Operator

It is the process of obtaining amplitude of a signal at regular intervals.

At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Link.

The hamming code is an error correction method using redundant bits. The number of bits is a function of the length of the data bits. In hamming code for a data unit of m bits, we use the formula 2r >= m+r+1 to determine the number of redundant bits needed. By rearranging the order of bit transmission of the data units, the hamming code can correct burst errors.

Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.

In parity check, a parity bit is added to every data unit so that the total number of 1s is even (or odd for odd parity).Simple parity check can detect all single bit errors. It can detect burst errors only if the total number of errors in each data unit is odd.In two dimensional parity checks, a block of bits is divided into rows and a redundant row of bits is added to the whole block.

A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes.

The protocols defined in application layer are

• TELNET

• FTP

• SMTP

• DNS

a. Divide the data into sections

b. Add the sections together using 1's complement arithmetic

c. Take the complement of the final sum, this is the checksum.

You need IT professionals who understand the big-picture impact of their work. Candidates should be able to explain how their efforts made a difference for their employers.

When the computers on the network simply listen and receive the signal, they are referred to as passive because they don’t amplify the signal in any way. Example for passive topology - linear bus.

a. Physical Layer

b. Data link Layer and

c. Network Layers

☛ NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications.

☛ NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets.

Another seemingly innocuous interview question, this is actually a perfect opportunity to stand out and show your passion for and connection to the company. For example, if you found out about the gig through a friend or professional contact, name drop that person, then share why you were so excited about it. If you discovered the company through an event or article, share that. Even if you found the listing through a random job board, share what, specifically, caught your eye about the role.

The transmission media is broadly categorized into two types

i)Guided media(wired)

i)Unguided media(wireless)

Has the candidate taken online classes, or do they spend some of their spare time coding or troubleshooting technology issues? Have they taken on work projects in areas of tech they want to learn more about?

The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.

☛ a. Security/Encapsulation

☛ b. Distributed database

☛ c. Faster Problem solving

☛ d. Security through redundancy

☛ e. Collaborative Processing

They divide large network into smaller components.They can relay frames between two originally separated LANs. They provide security through partitioning traffic.They operate on physical and data link layer of OSI model.

Sending a message to a group is called multicasting, and its routing algorithm is called multicast routing.

a. Frequency of failure

b. Recovery time of a network after a failure