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 1.0.0.1 to 126.255.255.254 – It supports 16 million hosts on each of 127 networks.
Class B range starts from 128.1.0.1 to 191.255.255.254 – It supports 65,000 hosts on each of 16,000 networks.
Class C range starts from 192.0.1.1 to 223.255.254.254 – 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
I am working in an IT company and having 10+ years of experience into Cisco IP Telephony and Contact Center. I have worked on products like CUCM, CUC, UCCX, CME/CUE, IM&P, Voice Gateways, VG224, Gatekeepers, Attendant Console, Expressway, Mediasense, Asterisk, Microsoft Teams, Zoom etc. I am not an expert but i keep exploring whenever and wherever i can and share whatever i know. You can visit my LinkedIn profile by clicking on the icon below.
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