The computer network of the Graduate Class IV

This time the teacher what characteristics, simple!

In this class we are divided into two parts, theory and practice,

An overview of the seven-layer/four-layer, followed by the Cisco Packet Tracer software to simulate a school laptop to visit the Google site of the general process

The course answered me a lot of doubts, once unfamiliar with a little suddenly understand, also let me epiphany a truth:

Why would I understand that

First, because the teacher told me directly;

Second, because the teacher is talking about the principle, speaking is the bottom, speaking of the most original things;

Three is because the teacher is not only to speak knowledge, but to give an example of the reality

Four, because I listened carefully.

Five because I've heard it many times.

，，，

In the comprehensive, I understand so quickly, so, you want to give someone clear a thing, you may try the above three strokes,

This is the name of the deep-burned noun:

1. Router is also called Gateway

2.

DHCP: Dynamic Address Configuration Protocol, (auto get IP address)

UDP: Unreliable transmission, purpose: Best effort, it is a non-connected protocol, can send data in real time, but poor reliability, usually applied to streaming media technology,

Because of streaming media: 1. Packet loss tolerance; 2. Time Sensitive

SNMP: Simple Network Management Protocol

SMTP: Mail Transfer Protocol

3. The IP address is usually hung on its network number, indicating the total number of network address, in order to calculate its subnet number

4.WireShark applied to Network grouping analysis

5. Multiplexing, multiplexing, and port use of the transport layer

6. Special IP Address

The address of the host number 0 represents a network (network number) and cannot be set as the host IP address

Example: 192.168.1.0 for Network number 192.168.1 network

Host number 1 addresses are used to broadcast to a network and cannot be set as the host IP address

For example, 192.168.1.255 represents sending packets to all hosts on a network with network number 192.168.1

All 1 address 255.255.255.255 is used to broadcast to this network and cannot be set as host IP address

127.0.0.1 represents native, for local testing

7. Dividing subnets

For example , the Class C IP address has 254 host addresses per network, but if a company is using a network number, but there are 1000 computers, b network can accommodate more than 60,000 hosts per network, obviously assigned to the company's Class B network is very unreasonable, many host addresses will be wasted, Therefore, the concept of the subnet is derived from the host number to borrow a number of bits as the subnet number, so that the host number corresponding to reduce the number of bits

Friendship Link

8. static/Dynamic routing algorithm

9. Basic configuration of the router using iOS commands

10. Configuring RIP

The theory is here, the following is a practical result map,

are connected, you can open the Google site on laptop,

Of course, the picture in the courseware is better to look at some

The computer network of the Graduate Class IV