1) What is a link?
A link is a connection between two devices. It includes cable types and protocols for one device to be able to communicate with another device.
2) What are the layers of the OSI reference model?
There are 7 OSI layers: physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.
3) What is the backbone network?
Backbone networks are centralized infrastructure designed to distribute different routes and data to various networks. It also handles bandwidth management and various channels.
4) What is a LAN?
LAN is an abbreviation for Local Area Network. It refers to the connection between a computer and other network devices located in a small physical location.
5) What is a node?
A node is a point where a connection occurs. It can be a computer or device that is part of a network. To form a network connection, two or more nodes are required.
6) What is a router?
A router can connect two or more network segments. These are intelligent network devices that store information in their routing tables, such as paths, hop counts, etc. Armed with this information, they can determine the best path for data transfer. Routers operate at the OSI network layer.
7) What is a peer-to-peer link?
It refers to a direct connection between two computers on a network. A point-to-point connection does not require any other network equipment other than the NIC cards that connect the cable to the two computers.
8) What is anonymous FTP?
Anonymous FTP is a way of granting users access to files on a public server. Users who are allowed to access data in these servers do not need to identify themselves, but log in as anonymous guests.
9) What is the subnet mask?
The subnet mask is combined with the IP address to identify two parts: the extended network address and the host address. Like IP addresses, subnet masks consist of 32 bits.
10) What is the maximum allowed length of UTP cable?
A single segment of UTP cable has an allowable length of 90 to 100 meters. This limitation can be overcome by using repeaters and switches
11) What is data encapsulation?
Data encapsulation is the process of breaking information into smaller manageable chunks before transmitting it over a network. During this process, the source and destination addresses are appended to the header along with parity.
12) Describe the network topology
Network topology refers to the layout of a computer network. It shows the physical layout of devices and cables, and how they connect to each other.
13) What is a VPN?
VPN means Virtual Private Network, a technology that allows the creation of a secure tunnel through a network such as the Internet.
For example, a VPN allows you to establish a secure dial-up connection to a remote server.
14) Briefly describe NAT.
NAT is Network Address Translation. A protocol that provides a way for multiple computers on a public network to share a single connection to the Internet.
15) What is the job of the network layer under the OSI reference model?
The network layer is responsible for data routing, packet switching and network congestion control. Routers operate below this layer.
