Top 50 Router Interview Questions and Answers

The latest router and switch used in the market are Cisco Catalyst 9000 Series switches and Cisco ASR 9000 Series routers.

• Cisco Catalyst 9000 Series switches are known for their advanced security features and programmability.

• They offer high performance and scalability for enterprise networks.

• Cisco ASR 9000 Series routers provide high-density, high-performance routing and are suitable for service provider networks.

• They support advanced features like segment routing and network...read more

Router is an active transformation as it can change the number of rows that pass through it based on conditions.

• Router transformation is used to route data from one source to multiple targets based on conditions.

• It can change the number of rows that pass through it based on the conditions specified.

• It evaluates each row against the conditions and sends the row to the appropriate output group.

• It is an active transformation as it changes the number of rows that pass through it....read more

A modem is a device that connects your computer to the internet through your ISP, while a router is a device that connects multiple devices to a network and manages traffic between them.

• Modem stands for modulator-demodulator and converts digital signals to analog signals for transmission over telephone lines

• Router directs traffic between devices on a network and can prioritize traffic for certain devices or applications

• Modem and router are often combined into a single device ...read more

A router is a networking device that forwards data packets between computer networks.

• Routers operate at the network layer of the OSI model.

• They use routing tables to determine the best path for data to travel.

• Routers can connect different types of networks, such as LANs and WANs.

• Examples of routers include Cisco, Juniper, and TP-Link.

• Routing is the process of selecting the best path for data to travel through a network.

Subnetting is the process of dividing a network into smaller subnetworks. Routers operate at the network layer (Layer 3) of the OSI model.

• Subnetting involves creating multiple smaller networks from a single larger network by dividing the IP address range.

• It helps in efficient utilization of IP addresses and improves network performance by reducing broadcast traffic.

• Routers operate at the network layer (Layer 3) of the OSI model and are responsible for forwarding data packets ...read more

A MAC address is a unique identifier assigned to a network interface controller for use as a network address in communications within a network segment.

• MAC stands for Media Access Control

• It is a 48-bit address

• It is used to uniquely identify devices on a network

• A router can have multiple MAC addresses, one for each interface

• MAC addresses are usually represented in hexadecimal format

• Example: 00:1A:2B:3C:4D:5E

A hub is a simple networking device that connects multiple devices in a network, while a router is a more advanced device that connects multiple networks together.

• Hub operates at physical layer, while router operates at network layer.

• Hub broadcasts data to all devices in the network, while router forwards data to specific devices based on IP addresses.

• Hub does not have intelligence to determine the best path for data transmission, while router can make decisions based on rout...read more

Routers connect different networks while switches connect devices within a network.

• Routers operate at the network layer of the OSI model while switches operate at the data link layer.

• Routers use routing tables to determine the best path for data to travel between networks while switches use MAC addresses to direct data within a network.

• Routers can connect networks with different protocols while switches cannot.

• Examples of routers include Cisco routers, Juniper routers, and TP...read more

A router is a networking device that forwards data packets between computer networks. To configure a router, access its web interface or command line interface and set up network settings.

• Access the router's web interface by entering its IP address in a web browser

• Log in with the router's username and password

• Navigate to the settings section to configure network settings such as IP address, subnet mask, and DNS servers

• Save the changes and restart the router for the new settin...read more

A server is a computer or software that provides functionality for other programs or devices, while a router is a networking device that forwards data packets between computer networks.

• A server can be used to host websites, store files, manage network resources, etc.

• Examples of servers include web servers, email servers, file servers, etc.

• A router connects multiple networks together and routes data packets between them.

• Routers use IP addresses to determine where to send data ...read more

A router is a networking device that forwards data packets between computer networks.

• Routers connect multiple networks together

• They use routing tables to determine the best path for data packets to travel

• They can provide security by blocking unauthorized access to a network

• Examples of routers include Cisco, Juniper, and TP-Link

A router is a networking device that forwards data packets between computer networks. Wifi is a wireless networking technology that allows devices to connect to a network wirelessly.

• Router is a device that connects multiple networks and routes data between them.

• Wifi is a wireless technology that allows devices to connect to a network without the need for physical cables.

• Routers are commonly used in homes and businesses to connect to the internet.

• Examples of routers include Ci...read more

CCNA stands for Cisco Certified Network Associate, a certification for networking professionals. A router is a networking device that forwards data packets between computer networks.

• CCNA is a certification offered by Cisco for networking professionals

• It covers topics such as network fundamentals, LAN switching technologies, routing technologies, and more

• A router is a networking device that forwards data packets between computer networks

• Routers operate at the network layer of ...read more

The layers that work in a router are the physical layer, data link layer, network layer, and transport layer.

• Physical layer: Responsible for transmitting raw data bits over a physical medium.

• Data link layer: Responsible for error detection and correction, as well as framing and flow control.

• Network layer: Responsible for routing packets to their destination based on IP addresses.

• Transport layer: Responsible for end-to-end communication and error recovery.

An IP switch router is a network device that combines the functions of a switch and a router, allowing for efficient data transmission and routing across networks.

• An IP switch router combines the features of a switch and a router.

• It can efficiently transmit data packets within a local network (switching) and between different networks (routing).

• IP switch routers use IP addresses to determine the destination of data packets.

• They can handle multiple network protocols, such as T...read more

The best router for storage and communications is Cisco ISR 4000 series, and the best servers are Dell PowerEdge R740.

• Cisco ISR 4000 series routers are known for their high performance, security features, and scalability.

• Dell PowerEdge R740 servers offer excellent storage capacity, processing power, and reliability.

• Consider factors like bandwidth requirements, security features, and scalability when choosing routers and servers for storage and communications.

Router in Angular is used for navigation between different components and views.

• Angular Router is a powerful tool for building single-page applications

• It allows you to define routes, which are URL patterns that map to specific components

• You can use routerLink directive to navigate between different views

• You can also use router.navigate method to programmatically navigate to a specific route

DNS is a system that translates domain names into IP addresses. A router is a networking device that forwards data packets between computer networks.

• DNS stands for Domain Name System

• It is responsible for resolving domain names to IP addresses

• DNS servers store information about domain names and their corresponding IP addresses

• A router is a hardware device that connects multiple networks together

• It forwards data packets between networks based on their IP addresses

• Routers can be...read more

Switches, hubs, and routers are used to connect devices in a network and manage traffic.

• Switches are used to connect devices within a local area network (LAN) and manage traffic between them.

• Hubs are similar to switches but are less efficient in managing traffic.

• Routers are used to connect multiple networks together and manage traffic between them.

• Switches and routers can also be used to prioritize traffic and improve network performance.

• Examples of switches include Cisco Cat...read more

The router will load the target that has the highest priority.

• Router group conditions are evaluated in order of priority.

• The target with the highest priority that satisfies both conditions will be loaded.

• Priority can be set using numerical values or by order of appearance in the configuration file.

Router IP configuration involves setting up the IP address, subnet mask, default gateway, and DNS servers.

• Assign a static IP address to the router within the network's range (e.g. 192.168.1.1).

• Set the subnet mask to define the network size (e.g. 255.255.255.0).

• Specify the default gateway IP address for routing traffic outside the local network.

• Configure DNS servers for domain name resolution (e.g. 8.8.8.8, 8.8.4.4).

Router functions to route data packets between different networks. Switch configuration involves setting up ports, VLANs, and security settings.

• Router functions include routing data packets between networks, determining the best path for data transmission, and providing network security.

• Switch configuration involves setting up ports, VLANs (Virtual Local Area Networks), and security settings to control traffic flow within a network.

• Examples of router functions include IP addr...read more

L2 switches operate at the data link layer and forward packets based on MAC addresses, while routers operate at the network layer and forward packets based on IP addresses.

• L2 switches are used to connect devices within a local network, while routers are used to connect different networks.

• L2 switches are faster than routers as they only need to look at the MAC address to forward packets, while routers need to look at the IP address.

• L2 switches do not perform any network addres...read more

Routers are used to connect different networks together and route traffic between them.

• Routers provide network segmentation and security by separating broadcast domains.

• They can also prioritize traffic and optimize network performance.

• Examples of routers include Cisco, Juniper, and MikroTik.

• Routers are essential for connecting to the internet and accessing remote networks.

A modem is a device that modulates and demodulates signals to enable communication between devices over a network. A router is a device that forwards data packets between computer networks.

• Modem converts digital data from a computer into analog signals for transmission over telephone lines

• Router directs data packets between devices on a network

• Modem is used to connect to the internet via an ISP

• Router creates a local area network (LAN) within a home or office

• Examples: Modem - ...read more

A router is a networking device that forwards data packets between computer networks.

• Routers operate at the network layer of the OSI model.

• They use routing tables to determine the best path for data packets to reach their destination.

• Routing involves selecting paths in a network along which to send network traffic.

• Routers can connect different types of networks, such as LANs and WANs.

• Examples of routers include Cisco routers, Juniper routers, and TP-Link routers.

Firewall filters network traffic based on predefined security rules, while router forwards data packets between computer networks.

• Firewall acts as a barrier between internal network and external network, filtering incoming and outgoing traffic based on security rules.

• Router forwards data packets between different computer networks, determining the best path for the packets to reach their destination.

• Firewall can block specific ports or IP addresses to prevent unauthorized acc...read more

A router is a networking device that forwards data packets between computer networks. MAC address is a unique identifier assigned to network interfaces for communications.

• A router operates at the network layer of the OSI model.

• It uses routing tables to determine where to forward data packets.

• MAC address stands for Media Access Control address.

• It is a hardware address that uniquely identifies a device on a network.

• MAC addresses are usually represented as six groups of two hexa...read more

A hub is a networking device that connects multiple devices in a network, while a router is a networking device that forwards data packets between computer networks.

• Hub operates at physical layer of OSI model

• Hub broadcasts data to all devices in the network

• Router operates at network layer of OSI model

• Router forwards data packets based on IP addresses

• Example of hub: Ethernet hub

• Example of router: Wi-Fi router

Yes, I have experience in configuring routers and switches.

• I have configured routers and switches for various clients in my previous job.

• I am familiar with different types of routers and switches such as Cisco, Juniper, etc.

• I have knowledge of configuring VLANs, routing protocols, and security features.

• I am comfortable working with command line interface (CLI) and graphical user interface (GUI) for configuration.

• I have also troubleshooted and resolved issues related to router...read more

Routers are networking devices that forward data packets between computer networks. Types include wired, wireless, core, edge, and virtual routers.

• Routers are used to connect multiple networks together

• Wired routers use physical cables to connect devices

• Wireless routers use Wi-Fi to connect devices

• Core routers are used in the backbone of the network

• Edge routers connect the network to external networks

• Virtual routers are software-based routers used in virtualized environments

A router is a device that forwards data packets between computer networks, while a modem is a device that modulates and demodulates signals for internet access.

• Router connects multiple devices to a network and routes data between them

• Modem connects a device to the internet by modulating and demodulating signals

• Examples: Router - TP-Link Archer C7, Modem - Motorola MB7420

Switch connects devices in a network and router connects networks together.

• Switch operates at data link layer and forwards data packets between devices in a network

• Router operates at network layer and forwards data packets between different networks

• Switch uses MAC address to forward data packets and router uses IP address

• Switch is used in LAN and router is used in WAN

• Example of switch: Cisco Catalyst 2960, Example of router: Cisco ASR 1000

Routers are used in SAP Fiori to define navigation paths and map URLs to specific views in the application.

• Routers help in defining the navigation flow within the SAP Fiori application.

• They allow mapping of URLs to specific views, enabling deep linking within the application.

• Routers help in managing the state of the application and handling navigation events.

• They are essential for creating a seamless user experience in SAP Fiori applications.

A modem router is a device that combines the functions of a modem and a router into one unit, allowing for both internet connection and network routing capabilities.

• Modem router connects to the internet through a modem and provides network routing capabilities through a router.

• It allows multiple devices to connect to the internet and communicate with each other within a local network.

• Examples include devices from brands like Netgear, TP-Link, and Linksys.

Routers connect multiple networks together, while switches connect devices within a single network.

• Routers operate at the network layer (Layer 3) of the OSI model, while switches operate at the data link layer (Layer 2).

• Routers use IP addresses to forward data between networks, while switches use MAC addresses to forward data within a network.

• Routers are typically used to connect different networks, such as a home network to the internet, while switches are used to connect de...read more

Routers are networking devices that forward data packets between computer networks.

• Routers operate at the network layer of the OSI model

• They use routing tables to determine the best path for data packets

• Routers can connect multiple networks together, such as LANs and WANs

• Examples of routers include Cisco routers, TP-Link routers, and Netgear routers

A router is a device that connects multiple networks and directs traffic between them, while a modem is a device that connects a computer or network to the internet.

• A router is used to create and manage a local area network (LAN) by directing data packets between devices.

• A modem is used to connect a computer or network to an internet service provider (ISP) to access the internet.

• Routers can be wired or wireless, while modems are typically wired.

• Routers have multiple Ethernet ...read more

Yes, a switch can be converted into a router by enabling routing features and configuring routing protocols.

• Enable routing features on the switch

• Configure routing protocols such as OSPF or EIGRP

• Assign IP addresses to interfaces

• Implement access control lists for security

• Install a routing software image if necessary

A router is a networking device that forwards data packets between computer networks.

• Routers use routing tables to determine the best path for data packets to reach their destination.

• Routers operate at the network layer of the OSI model.

• Routers can connect multiple networks together, such as a home network to the internet.

• Routers can be wired or wireless, such as Wi-Fi routers.

• Routers can provide security features like firewalls to protect networks from unauthorized access.

The modem is connected to the router in a sequential manner.

• The modem is the first device in the sequence, as it connects to the internet service provider (ISP).

• The router is then connected to the modem, acting as a gateway between the modem and the local network.

• Devices such as computers, smartphones, and smart TVs are connected to the router to access the internet.

• The sequential connection allows the router to manage network traffic and provide internet connectivity to mult...read more

Switches connect devices within a network, while routers connect different networks and enable communication between them.

• Switches operate at the data link layer of the OSI model and use MAC addresses to forward data within a network.

• Routers operate at the network layer of the OSI model and use IP addresses to route data between different networks.

• Switches create multiple collision domains, while routers create multiple broadcast domains.

• Switches are used in LANs to connect d...read more

DHCP commands in a router allow for configuration and management of DHCP settings.

• DHCP commands can be used to enable or disable DHCP on a router interface

• Commands can also be used to configure DHCP pools, lease times, and network settings

• Examples of DHCP commands include 'ip dhcp pool', 'network', 'default-router', and 'lease'

Switch connects devices within a network based on MAC addresses, while router connects multiple networks based on IP addresses.

• Switch operates at layer 2 of the OSI model, while router operates at layer 3.

• Switch forwards data only to the intended recipient based on MAC addresses, while router forwards data between different networks based on IP addresses.

• Switch is used to create LANs, while router is used to connect different networks such as LANs and WANs.

• Example: A switch i...read more

To access your 192.168.0.1 router, you need to open a web browser and enter the IP address in the address bar.

• Open a web browser on your computer or device.

• Type 'http://192.168.0.1' in the address bar and press Enter.

• You will be prompted to enter a username and password to access the router settings.

• Once logged in, you can configure your router settings as needed.

Switches operate at layer 2 of the OSI model and forward data based on MAC addresses, while routers operate at layer 3 and forward data based on IP addresses.

• Switches operate at layer 2 of the OSI model, while routers operate at layer 3.

• Switches forward data based on MAC addresses, while routers forward data based on IP addresses.

• Switches are used to create LANs, while routers are used to connect different networks.

• Switches are typically used within a single network, while ro...read more

Routers connect multiple networks together, while switches connect devices within a single network.

• Routers operate at the network layer (Layer 3) of the OSI model, while switches operate at the data link layer (Layer 2).

• Routers use IP addresses to forward data between networks, while switches use MAC addresses to forward data within a network.

• Routers are typically used to connect different networks, such as a home network to the internet, while switches are used to connect de...read more

Switches operate at layer 2 of the OSI model, forwarding data based on MAC addresses. Routers operate at layer 3, forwarding data based on IP addresses.

• Switches operate at layer 2 of the OSI model, while routers operate at layer 3.

• Switches forward data based on MAC addresses, while routers forward data based on IP addresses.

• Switches are used to create LANs, while routers are used to connect different networks.

• Switches are typically used within a single network, while routers ...read more

A router is a networking device that forwards data packets between computer networks. A switch is a networking device that connects devices within a network.

• A router operates at the network layer (Layer 3) of the OSI model and uses IP addresses to route packets.

• Routers are used to connect multiple networks together, such as connecting a home network to the internet.

• Routers can determine the best path for data packets to reach their destination.

• A switch operates at the data li...read more

Routers connect multiple networks together, while switches connect devices within a single network.

• Routers operate at the network layer (Layer 3) of the OSI model, while switches operate at the data link layer (Layer 2).

• Routers use IP addresses to forward data between networks, while switches use MAC addresses to forward data within a network.

• Routers determine the best path for data packets based on routing tables, while switches use MAC address tables to forward data to the ...read more

Switch operates at data link layer and forwards data based on MAC addresses, while router operates at network layer and forwards data based on IP addresses.

• Switch operates at layer 2 of OSI model, while router operates at layer 3.

• Switch forwards data within the same network, while router forwards data between different networks.

• Switch uses MAC addresses to make forwarding decisions, while router uses IP addresses.

• Switch is typically used in LANs, while router is used to conne...read more

A router is a networking device that forwards data packets between computer networks, while a switch is a networking device that connects devices within a network.

• Routers operate at the network layer (Layer 3) of the OSI model, while switches operate at the data link layer (Layer 2).

• Routers use IP addresses to route traffic between different networks, while switches use MAC addresses to forward data within a network.

• Routers can connect multiple networks together, while switch...read more

Routers connect different networks while switches connect devices within a network.

• Routers operate at the network layer of the OSI model while switches operate at the data link layer.

• Routers use routing tables to determine the best path for data to travel between networks while switches use MAC addresses to forward data within a network.

• Routers can provide security by using access control lists (ACLs) while switches do not have this capability.

• Examples of routers include Cisc...read more

The statement is incorrect. Routers route between different networks, while switches connect devices within the same network.

• Routers route traffic between different networks based on IP addresses

• Switches connect devices within the same network based on MAC addresses

• Example: A router connects a home network to the internet, while a switch connects devices within the home network

Routers connect different networks, while switches connect devices within a network.

• Routers operate at the network layer and make decisions based on IP addresses

• Switches operate at the data link layer and use MAC addresses to forward data

• Routers can connect multiple networks together, while switches connect devices within the same network

• Example: A router connects a home network to the internet, while a switch connects devices within the home network