Basic Networking Interview Questions and Answers
Question: What is a broadcast and a collision domain?
Ans: A broadcast domain is a logical division of a computer network, in which all nodes can reach each other by broadcast at the data link layer whereas a collision domain is a section of a network where data packets can collide with one another when being sent on a shared medium or through repeaters.
Question: What is the range of Class A, Class B and Class C IP Address?
Ans: The following are the range of Class A, Class B and Class C IP Address.
Class A range starts from 184.108.40.206 to 220.127.116.11 – It supports 16 million hosts on each of 127 networks.
Class B range starts from 18.104.22.168 to 22.214.171.124 – It supports 65,000 hosts on each of 16,000 networks.
Class C range starts from 126.96.36.199 to 188.8.131.52 – It supports 254 hosts on each of 2 million networks.
Question: What is PoE (Power over Ethernet)?
Ans: Power over Ethernet or PoE is a technology which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as IP Cameras or Wireless Access Points.
Question: What is the difference between tracert and traceroute?
Ans: Traceroute command is used on a router or a switch where as tracert command would be used in a PC.
Question: What is Round Trip Time?
Ans: Round-trip time (RTT) is also termed as round-trip delay which is the time required for a packet to travel from a specific source to a specific destination and back again.
Question: What are the different types of cable?
Ans: The following are the different types of cable –
Straight cable – To connect different group devices (Switch, Router etc)
Cross Cable – To connect same group device (PC –PC, Switch –Switch, Router-Router)
Rollover cable – To connect Console port to Computer