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I applied via Naukri.com and was interviewed in Nov 2022. There was 1 interview round.
ARP is used to map IP addresses to MAC addresses on a local network.
ARP stands for Address Resolution Protocol.
It is used to find the MAC address of a device based on its IP address.
ARP is essential for communication between devices on the same network.
ARP cache stores the mapping of IP addresses to MAC addresses for faster communication.
Example: When a computer wants to communicate with another device on the network, ...
HSRP, VRRP, and GLBP are all protocols used for providing redundancy in network environments.
HSRP (Hot Standby Router Protocol) is Cisco's proprietary protocol for providing high availability by allowing two or more routers to work together in a group.
VRRP (Virtual Router Redundancy Protocol) is an open standard protocol similar to HSRP, used for providing a virtual IP address that can be shared among multiple routers.
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Root bridge election in a network is determined by the bridge ID and the lowest path cost to the root bridge.
Root bridge is the bridge with the lowest bridge ID in the network.
Bridge ID consists of a priority value and a MAC address.
If two bridges have the same priority, the bridge with the lowest MAC address will become the root bridge.
Each bridge calculates the path cost to the root bridge based on the cumulative cos...
I will troubleshoot network issues by following a systematic approach to identify and resolve the root cause.
Start by gathering information about the issue reported
Check physical connections and cables
Verify network configurations and settings
Use network monitoring tools to identify any anomalies
Isolate the issue by testing connectivity between devices
Check for any network congestion or bandwidth issues
Consult network ...
STP (Spanning Tree Protocol) is a network protocol that ensures a loop-free topology in Ethernet networks.
STP prevents loops in Ethernet networks by blocking redundant paths.
It elects a root bridge to serve as the central point for the network.
STP uses Bridge Protocol Data Units (BPDUs) to exchange information between switches.
Common STP states include Blocking, Listening, Learning, Forwarding, and Disabled.
STP converg...
DHCP process involves four steps: Discover, Offer, Request, Acknowledge (DORA).
Discover: Client broadcasts a DHCP Discover message to find available DHCP servers.
Offer: DHCP server responds with a DHCP Offer message containing IP address lease information.
Request: Client sends a DHCP Request message to request the offered IP address.
Acknowledge: DHCP server sends a DHCP Ack message confirming the IP address lease to th
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers. TCP/IP is a protocol suite that is used for communication over the internet.
OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application
TCP/IP is a protocol suite that includes TCP (Transmission Control Protocol) and IP (Internet Protocol)
...
Subnetting is the process of dividing a network into smaller subnetworks to improve performance and security.
Subnetting helps in optimizing network performance by reducing network congestion.
It allows for better organization and management of IP addresses.
Subnetting enhances network security by isolating different parts of the network.
Example: Dividing a large network into smaller subnets based on departments or locati
VSF and VSX are both technologies used in networking for virtualization and redundancy, but they have key differences in terms of implementation and capabilities.
VSF (Virtual Switching Framework) is used in HPE Aruba switches to create a single logical switch from multiple physical switches, providing redundancy and scalability.
VSX (Virtual Switching Extension) is used in Cisco Nexus switches to create a virtual chassi...
ACL stands for Access Control List and is used to control network traffic by allowing or denying packets based on defined rules.
ACLs can be used to filter traffic based on source or destination IP address, protocol, port number, etc.
They can be applied on routers, switches, and firewalls to control access to network resources.
ACLs can improve network security by restricting unauthorized access to sensitive data.
Example...
To upgrade firmware, you need to download the latest firmware version from the manufacturer's website and follow the specific instructions provided.
Download the latest firmware version from the manufacturer's website
Backup current configuration before upgrading
Follow specific instructions provided by the manufacturer
Test the new firmware in a controlled environment before deploying it in production
To configure SSID, access the wireless router's settings and enter the desired network name, security type, and password.
Access the wireless router's settings through a web browser
Locate the wireless settings section
Enter the desired SSID (network name)
Select the appropriate security type (WPA2, WEP, etc.)
Set a strong password for the network
Save the changes and restart the router if necessary
To configure 802.1x protocol, you need to set up authentication servers, configure network devices, and define access policies.
Set up authentication servers such as RADIUS or TACACS+
Configure network devices (switches, routers, wireless access points) to support 802.1x
Define access policies for different user roles and devices
Enable 802.1x on network ports and specify authentication methods (EAP-TLS, PEAP, etc.)
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I applied via Naukri.com and was interviewed in Sep 2022. There were 2 interview rounds.
L1 and system troubleshooting methods involve identifying and resolving issues in network and system infrastructure.
L1 troubleshooting involves basic checks and identifying common issues
System troubleshooting involves identifying issues with hardware, software, and network components
Methods include using diagnostic tools, analyzing logs, and following established procedures
Examples of issues include network connectivit
I applied via Naukri.com and was interviewed in Feb 2021. There were 3 interview rounds.
Routing and switching are fundamental concepts in computer networking that involve directing and forwarding data packets.
Routing is the process of determining the best path for data packets to travel from one network to another.
Switching is the process of forwarding data packets within a network based on their destination MAC addresses.
Routing protocols like OSPF and BGP are used to exchange routing information between...
LAN/WAN refers to local area network and wide area network respectively. VLAN is a virtual LAN that allows for logical segmentation of a network.
LAN is a network that covers a small geographical area, typically within a single building or campus.
WAN is a network that spans a large geographical area, connecting multiple LANs or remote locations.
VLAN is a virtual LAN that enables the creation of multiple logical networks...
A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Firewall acts as a barrier between a trusted internal network and an untrusted external network.
It examines network packets and filters them based on rules to allow or block traffic.
Firewalls can be hardware-based or software-based.
Examples of firewalls include Cisco ASA, Palo A
I applied via Naukri.com and was interviewed before Jul 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before Aug 2021. There were 3 interview rounds.
You have to pass this test. You can check previous papers for more information.
I applied via Approached by Company and was interviewed in Jan 2024. There were 2 interview rounds.
posted on 26 Mar 2024
I applied via Naukri.com and was interviewed in Feb 2024. There was 1 interview round.
STP (Spanning Tree Protocol) is used to prevent loops in a network by blocking redundant paths between switches.
STP elects a root bridge to serve as the central point in the network
Each switch determines the best path to the root bridge based on the lowest path cost
Ports on switches are designated as root ports, designated ports, or blocking ports to create a loop-free topology
Site-to-Site VPN on Palo Alto firewalls allows secure communication between different sites.
Configure VPN tunnel interface on both firewalls
Define IKE gateway and IPsec crypto profile
Create VPN tunnel interface and assign IP address
Define security policies to allow traffic through the VPN tunnel
I applied via Naukri.com and was interviewed in May 2023. There were 4 interview rounds.
English comphresion,logical reasoning,Numerical
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