Network Support Engineer L1 Interview Questions and Answers for Freshers

OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system. Transport layer is responsible for end-to-end communication between applications.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Transport layer provides reliable and sequential delivery of data between end systems.

• It ensures error-free data transmission, flow control, and congestion...read more

The network layer is responsible for logical addressing and routing of data packets across different networks.

• Network layer is the third layer of the OSI model.

• It provides logical addressing to devices on the network.

• IP (Internet Protocol) is a commonly used protocol at this layer.

• Routing protocols like OSPF and BGP operate at this layer.

• Network layer devices include routers and layer 3 switches.

DHCP stands for Dynamic Host Configuration Protocol. It is a network protocol that automatically assigns IP addresses to devices on a network.

• DHCP server assigns IP addresses to devices on a network

• It also provides other network configuration information such as subnet mask and default gateway

• DHCP uses a lease mechanism to manage IP address assignments

• DHCP clients request IP addresses from DHCP servers

• DHCP operates on UDP port 67 for server side and UDP port 68 for client sid...read more

DNS stands for Domain Name System. It translates domain names to IP addresses to locate resources on the internet.

• DNS is like a phone book for the internet, translating domain names to IP addresses.

• It helps users access websites by translating human-readable domain names (e.g. google.com) to machine-readable IP addresses (e.g. 172.217.3.206).

• DNS works through a hierarchical system of servers, with the top-level servers containing information about the root domain names.

• DNS qu...read more