10+ Network Support Engineer L1 Interview Questions and Answers

Routers work with firewalls, access lists, switching, BGP, SSH, Telnet, DHCP, and DNS to manage network traffic and connectivity.

• Routers use access lists to control traffic flow and enforce security policies.

• Switching allows routers to forward packets to their intended destinations.

• BGP is a routing protocol used to exchange routing information between different networks.

• SSH and Telnet are protocols used to remotely access and manage routers.

• DHCP servers assign IP addresses to...read more

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

I have hands-on experience in network monitoring and troubleshooting at client sites, ensuring optimal performance and quick issue resolution.

• Conducted regular network performance assessments to identify potential bottlenecks.

• Utilized tools like Wireshark and SolarWinds for real-time monitoring and analysis.

• Resolved connectivity issues by diagnosing hardware failures and misconfigurations.

• Collaborated with clients to understand their network requirements and provided tailored...read more

VLAN is a logical grouping of devices on a network, while trunk is a link that carries multiple VLANs. Switch configuration involves setting up VLANs and trunks on a switch.

• VLAN separates broadcast domains and improves network performance

• Trunk allows multiple VLANs to be carried over a single link

• Switch configuration involves assigning ports to VLANs, configuring VLAN interfaces, and setting up trunk links

• Example: VLAN 10 for finance department, VLAN 20 for marketing departme...read more

The div tag in HTML is used to create a division or a section in a web page.

• Used to group and style content

• Can be used to create layout structures

• Can be styled using CSS

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

Common processor types in laptops include Intel Core i3, i5, i7, and i9, as well as AMD Ryzen series.

• Intel Core i3, i5, i7, i9

• AMD Ryzen series

Amazon EC2 (Elastic Compute Cloud) is a web service that provides resizable compute capacity in the cloud.

• Virtual servers in the cloud

• Pay-as-you-go pricing model

• Scalable and flexible computing resources

• Supports various operating systems and applications

OSPF (Open Shortest Path First) is a routing protocol used to find the best path for data packets in IP networks.

• OSPF is a link-state routing protocol

• It uses Dijkstra's algorithm to calculate the shortest path

• OSPF routers exchange link-state advertisements (LSAs) to build a topology database

• It supports VLSM (Variable Length Subnet Masking) and CIDR (Classless Inter-Domain Routing)

• OSPF is widely used in large enterprise networks and ISPs

Subnetting is the process of dividing a network into smaller subnetworks to improve performance and security.

• Subnetting helps in optimizing network resources and improving security by creating smaller, more manageable networks.

• It involves dividing an IP network into subnets based on specific criteria such as geographical location, department, or function.

• Subnetting allows for better organization of network devices and more efficient routing of network traffic.

• For example, a n...read more