IP Solutions Technologies Network Engineer Interview Questions, Process, and Tips

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 multiple areas for scalability

• OSPF uses cost as a metric to determine the best path

Path vector routing protocols are a type of routing protocol that uses a vector of paths to determine the best route for data packets.

• Path vector routing protocols store the entire path to a destination network along with the associated cost.

• Examples of path vector routing protocols include BGP (Border Gateway Protocol) and EIGRP (Enhanced Interior Gateway Routing Protocol).

EIGRP (Enhanced Interior Gateway Routing Protocol) is a Cisco proprietary routing protocol that uses a metric based on bandwidth and delay.

• EIGRP is a distance vector routing protocol developed by Cisco.

• It uses a metric based on bandwidth and delay to determine the best path to a destination.

• EIGRP uses a concept called 'hop count' to measure the distance between routers.

• The maximum hop count in EIGRP is 224.

Access control list is a set of rules that controls which traffic is allowed or denied on a network device.

• ACLs are used to filter traffic based on source and destination IP addresses, ports, and protocols

• They can be configured on routers, switches, and firewalls

• ACLs can be either standard or extended, with extended ACLs offering more granular control

• Example: Denying all traffic from a specific IP address using an ACL

Natting stands for Network Address Translation, a process used to modify network address information in packet headers while in transit.

• Natting allows multiple devices on a local network to share a single public IP address

• Types of NAT include Static NAT, Dynamic NAT, and Port Address Translation (PAT)

• NAT helps conserve public IP addresses and adds a layer of security by hiding internal IP addresses

• Example: A home route...read more