Network Engineer Interview Preparation Guide

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A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.

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.

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.

A node that is connected to two or more networks is commonly called as router or Gateway. It generally forwards message from one network to another.

If the physical links are limited to a pair of nodes it is said to be point-point link.

If the physical links are shared by more than two nodes, it is said to be Multiple Access.

☛ Security/Encapsulation
☛ Distributed database
☛ Faster Problem solving
☛ Security through redundancy
☛ Collaborative Processing

☛ Performance:
It can be measured in many ways, including transmit time and response time.
☛ Reliability:
It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network's robustness.
☛ Security:
Security issues includes protecting data from unauthorized access and viruses.

☛ Number of Users
☛ Type of transmission medium
☛ Hardware
☛ Software

☛ Frequency of failure
☛ Recovery time of a network after a failure