10+ Senior Network Administrator Interview Questions and Answers

The feasible distance matrix component is chosen to prefer the less preferred route over the successor route in EIGRP route manipulation.

• The feasible distance is the metric used by EIGRP to determine the best route to a destination.

• By manipulating the feasible distance, a network engineer can influence the selection of routes.

• To prefer a less preferred route over the successor route, the network engineer can increase the feasible distance of the successor route.

• This can be ac...read more

OSPF LSA types include Router LSA, Network LSA, Summary LSA, and ASBR Summary LSA, each serving a specific purpose in building the OSPF database.

• Router LSA: Generated by each router to describe its directly connected links.

• Network LSA: Generated by DR to describe the network and its attached routers.

• Summary LSA: Generated by ABR to advertise routes between areas.

• ASBR Summary LSA: Generated by ASBR to advertise external routes into OSPF domain.

• Different LSAs contribute to OSPF...read more

STP prevents switching loops by creating a loop-free logical topology and blocking redundant paths.

• STP creates a loop-free logical topology by placing certain ports in blocking state to prevent loops.

• RSTP (Rapid Spanning Tree Protocol) improves upon STP by reducing convergence time and introducing alternate port roles.

• MSTP (Multiple Spanning Tree Protocol) improves upon STP by allowing for multiple spanning tree instances, each with its own root bridge.

EIGRP's DUAL algorithm is a loop-free routing algorithm used for route computation and convergence in EIGRP networks.

• DUAL algorithm ensures loop-free paths by maintaining a topology table with feasible successors and successors for each destination.

• When a link or route fails, DUAL algorithm calculates a new loop-free path to the destination using feasible successors.

• DUAL algorithm minimizes convergence time by quickly recalculating routes based on the new network topology.

• EIG...read more

I ensure clear communication and alignment between clients and internal teams by establishing regular meetings, setting clear expectations, utilizing project management tools, and providing updates.

• Establish regular meetings with clients and internal teams to discuss project progress and address any issues

• Set clear expectations and goals for all parties involved to ensure everyone is on the same page

• Utilize project management tools such as Trello or Asana to track tasks and d...read more

An IP address is a unique numerical label assigned to each device connected to a computer network using the Internet Protocol for communication.

• IP address stands for Internet Protocol address

• It is a logical address assigned to devices on a network

• It is a unique number separated by dots, such as 192.168.0.24

When handling a high-priority incident in a production environment, I follow a structured approach to quickly resolve the issue.

• Immediately assess the severity of the incident and prioritize based on impact

• Notify relevant stakeholders and create a dedicated communication channel for updates

• Gather all necessary information such as logs, error messages, and recent changes

• Formulate a plan of action with clear steps to troubleshoot and resolve the issue

• Implement the plan while ke...read more

BGP Path Selection process determines the best path based on various attributes.

• BGP routers receive multiple paths to a destination network from different peers.

• BGP uses a set of criteria to select the best path, such as AS path length, local preference, origin code, etc.

• The path with the highest weight is chosen as the best path and used for routing.

• If the weight is the same, BGP compares the local preference, then the AS path length, and so on.

• BGP can also use route reflect...read more

Topology refers to the physical arrangement of computer system nodes connected to each other via communication medium.

• Topology determines how devices are connected in a network

• Common topologies include bus, star, ring, mesh, and hybrid

• Each topology has its own advantages and disadvantages

• Topology affects network performance, scalability, and fault tolerance

ITIL is a framework for IT service management that focuses on aligning IT services with the needs of the business.

• ITIL stands for Information Technology Infrastructure Library

• It provides a set of best practices for IT service management

• ITIL certification is a globally recognized qualification for IT professionals

• ITIL procedures help organizations improve their IT service delivery and customer satisfaction

• ITIL includes processes such as incident management, problem management,...read more