AGC Networks Network Engineer Interview Questions and Answers for Experienced

Q1. Packet flow in PALO ALTO FIREWALL?
Ans. 
Packet flow in Palo Alto Firewall involves multiple stages including ingress, policy lookup, security policy enforcement, NAT, and egress.
• Packet enters the firewall through an ingress interface

• Firewall performs policy lookup to determine if the packet should be allowed or denied

• If allowed, the packet goes through security policy enforcement which includes threat prevention, URL filtering, etc.

• NAT (Network Address Trans...read more
Answered by AI
Add your answer
Q2. Ospf states and explain?
Ans. 
OSPF (Open Shortest Path First) is a routing protocol used to determine the best path for data packets in a network.
• OSPF is a link-state routing protocol

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

• OSPF routers exchange link-state advertisements (LSAs)

• It supports VLSM (Variable Length Subnet Masking)

• OSPF areas are used to divide large networks into smaller segments
Answered by AI
Add your answer
Q3. Election of DR AND BDR IN OSPF?
Ans. 
DR and BDR in OSPF are elected based on priority values, with the highest priority becoming the DR and the second highest becoming the BDR.
• DR and BDR are elected within the OSPF network to ensure efficient communication and redundancy.

• The election process is based on priority values assigned to each router, with the highest priority becoming the DR and the second highest becoming the BDR.

• If two routers have the same pr...read more
Answered by AI
Add your answer

Q1. Explain Firewall
Ans. 
Firewall is a network security system 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 untrusted external network.

• It can be implemented in hardware, software, or a combination of both.

• Firewalls can filter traffic based on IP addresses, ports, protocols, and application types.

• They can prevent unauthori...read more
Answered by AI
Add your answer
Q2. Explain Switching and routing
Ans. 
Switching involves forwarding data packets within a network, while routing involves determining the best path for data packets to travel between networks.
• Switching operates at Layer 2 of the OSI model, using MAC addresses to forward data within a local network.

• Routing operates at Layer 3 of the OSI model, using IP addresses to determine the best path for data to travel between networks.

• Switches use MAC address tables t...read more
Answered by AI
Add your answer

Q1. Salary related questions
Add your answer
Q2. Location and position
Add your answer

Q1. Qualification, experience, current salary, Expected salary, other qualification
Add your answer

Q1. About network, switch, router, firewall, switch protocol, set of rull, routing protocol - static, dynamic, ospf,bgp, network topology
Add your answer

Q1. Routing & switching,Firewall,SDWAN,
Add your answer

Q1. Depending on candidate
Add your answer
Q2. Solve the solution
Add your answer
Q3. Provide support
Add your answer

Must have knowege of the work

Q1. Nothing only basic they are osking
Add your answer
Q2. Must have basic knowledge of the work
Add your answer

Q1. Salary related questions
Add your answer
Q2. Location and position
Add your answer

Q1. How does OSPF works?
Ans. 
OSPF is a link-state routing protocol that uses Dijkstra's algorithm to calculate the shortest path to a destination network.
• OSPF routers exchange link-state advertisements (LSAs) to build a complete topology of the network.

• Each router calculates the shortest path to every network using Dijkstra's algorithm.

• OSPF uses cost as its metric, which is based on the bandwidth of the link.

• OSPF supports multiple areas, which red...read more
Answered by AI
Add your answer
Q2. How does the BGP works?
Ans. 
BGP is a routing protocol used to exchange routing information between different autonomous systems.
• BGP uses TCP as its transport protocol.

• It operates on a hop-by-hop basis, meaning that it only exchanges routing information with its directly connected neighbors.

• BGP uses path attributes to determine the best path for a given destination.

• BGP can be used for both IPv4 and IPv6 routing.

• BGP is commonly used by Internet Ser...read more
Answered by AI
Add your answer
Q3. How to check copper twisted pair?
Ans. 
Copper twisted pair can be checked using a cable tester to ensure proper connectivity and identify any faults.
• Use a cable tester to check for continuity and proper wiring

• Check for any faults such as shorts, opens, or miswires

• Verify that the cable meets the required specifications for the network

• Perform a loopback test to ensure that data can be transmitted and received properly
Answered by AI
Add your answer
Q4. How to identify leased line modem fault?
Ans. 
Identifying leased line modem fault
• Check if the modem is powered on and all cables are properly connected

• Check the modem's status lights for any abnormalities

• Perform loopback tests to check for connectivity issues

• Check the modem's configuration settings

• Replace the modem if all other troubleshooting steps fail
Answered by AI
Add your answer
Q5. How to find the reliability of a link on Cisco routers?
Ans. 
To find the reliability of a link on Cisco routers, use the show interface command.
• Log in to the Cisco router using the console or Telnet/SSH.

• Enter the command 'show interface' to display the status of all interfaces on the router.

• Look for the 'input errors' and 'output errors' fields to determine the reliability of the link.

• If there are a high number of errors, the link may be unreliable and require troubleshooting.

• Ot...read more
Answered by AI
Add your answer