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Local Area Network

Questions concerning the setting up, troubleshooting and operation of wired LANs used by businesses and other organizations

4,003 Questions

How many PC that can put on class c?

Class C have 8 bit use for host address. So we have 2^8=256 address, but the first and the last one is not used for host => 256-2=254 PC (or host)

What does the Controller Area Network actually do?

The Controller Area Network also known as CAN works ad a message transmission station to direct buses and other publicly funded vehicles on where to go and what locations they need to be at.

What resides at the physical layer of the OSI layer?

Interfaces used on the system to connect to Network devices reside on Physical layer.

Describe 4 different scenarios when an ip router would drop packets that arrive on one of its interfaces?

1) ACL (Access Control List) policy instructs the router to drop it. This is a "rule" configured intentionally by the router's administrator to control traffic.

2) The packed fails an RPF (Reverse Path Forwarding) check. This is when a packet arrives with a source address that doesn't make sense, and it appears like an attempt at malicious activity.

3) The input queue is full. This is basically a symptom of the router being overloaded.

4) The packet fails a basic sanity check, such as TTL (Time to Live) expiring, or failing a CRC (Cyclic Redundancy Check), although that is actually a Layer 2 function, not IP.

5) The packet has a requirement that the router is unable to accomodate. Examples of this would be a non-UDP encapsulated IPSec packet whos destination address requires translation, or a multicast packet arriving at a router that is not configured for multicast routing.

What hardware does a bus topology need?

A bus topology needs a trunk cable, which is a high speed central cable to which all the nodes can be connected. If the trunk cable breaks down, however, the whole network comes to a halt.

Why do link-state protocols converge faster than most distance vector protocols?

Distance vector protocols compute their routing tables before sending routing updates; link-state protocols do not.

When to have a peer to peer?

Computer with internet access.

Network cables connected to each machine.

Program installed on each computer.

What are the Functions of each ip address class?

In classfull addressing schemes each address class limited the total number of clients per network. Other than that, there are no particular functions for each address class.

What is your gateway address?

The gateway address is your router's inside local address. To find what your gateway and IP are you can open a Command Prompt (CMD) window and type "ipconfig/all" without quotes. Make sure you run the Command Prompt as an administrator when you open it.