Enterprise Networking 1 Flashcards

Flashcards for reviewing key concepts in enterprise networking.

List three non-volatile memory types used by a network router.

ROM, NVRAM, and Flash.

What are the three main components that operate a network router?

Central processing unit (CPU), Operating system (OS), and Memory and storage (RAM, ROM, NVRAM, Flash, hard drive).

Describe when a router is needed when a PC forwards a packet into a network.

If PC forwards packets within the same network, no router is needed. If PC forwards packets to a different network, a router is needed as PC will forward to the default gateway.

List three main components of dynamic routing protocols.

Data structures, routing protocol messages, and algorithms.

Explain the use of Floating Static Routes.

The Floating Static Routes are used to create a backup route in case a primary route link fails.

How does Routing Information Protocol (RIP) determine its best path?

RIP determines its best path by hop count from source to destination.

What is the command to reset the router ID?

clear ip ospf process

What are the two network routes that are used by routers to learn about remote networks?

Routers use static routes and dynamic routing protocols to learn about remote networks.

Calculate the wildcard mask for subnet mask of 255.255.255.240.

0.0.0.15

What is the network cost of using a serial (128 kbps) interface type? (100,000,000 bps / 128,000 bps = ?)

781

List three disadvantages of using dynamic route in a computer network.

It is more complex to implement, less secure, and requires additional CPU/RAM and link bandwidth.

List four roles of Dynamic Routing Protocols in a computer network.

Discovery of remote networks, maintaining up-to-date routing information, choosing the best path to destination networks, and ability to find a new best path if the current path is no longer available.

Which of the OSPF data structures creates the topology table in the network?

Link-state database (LSDB).

How does a router determine the best path to send packets over the computer network?

Routers use routing tables to determine the best path to send packets.

Which of the OSPF data structures creates the routing table in the network?

Forwarding database.

Explain Administrative Distance in computer networking.

The Administrative Distance (AD) represents the "trustworthiness" of the route. The route source with lower AD will be more trustworthy than the route source with higher AD.

The Passive Interface feature disables routing updates advertisements on the interface which usually connects to a non-router neighbor.

What is the feature of using a passive interface on a router?

List three disadvantages of link-state routing protocols.

Maintaining link-state database and SPF tree requires additional memory, calculating SPF algorithm also requires additional CPU processing, and bandwidth can be adversely affected by link-state packet flooding.

What are the benefits of performing load balancing on a computer network?

Equal cost load balancing can improve network performance.

List two link-state routing protocols.

Open Shortest Path First (OSPF) and IS-IS.

Calculate the wildcard mask for subnet mask of 255.255.240.0.

0.0.15.255

How does Enhanced Interior Gateway Routing Protocol (EIGRP) determine its best path?

EIGRP determines its best path by bandwidth, delay, load, and reliability.

Explain the difference between static routes and dynamic routes in a computer network.

Static Routes: Remote networks are manually entered into the route table. Dynamic Routes: Remote networks are automatically learned using a dynamic routing protocol.

show ip protocols

What is the command to verify OSPF Protocol Settings?

Calculate the wildcard mask for subnet prefix /18.

0.0.63.255

List five features of OSPF.

Classless, efficient, fast convergence, scalable, and secure.

List three dynamic routing protocols that are used by routers.

Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Enhanced Interior Gateway Routing Protocol (EIGRP).

How does Open Shortest Path First (OSPF) determine its best path?

OSPF determines its best path by cost based on cumulative bandwidth from source to destination.

Explain the use of Summarized Static Routes.

The Summarized Static Routes are used to reduce the number of routes advertised by summarizing several contiguous networks as one static route.

List three advantages of using a static route in a computer network.

It is easy to implement in a small network, very secure, and extra resources like CPU/RAM are not required.