Computer network (Network Part II) 3–4 days

Day 03

1. What is the order of t568a and t568b? which is responsible for sending, and which is responsible for receiving?
T568A line sequence: White green, green, white orange, blue, white blue, orange, white brown, brown
T568B line sequence: white orange, orange, white green, blue, white blue, green, white brown, brown
Send, 3,6 receive

2. What is a standard cable? What is a crossover cable? What are the conditions for use?
Standard cable (direct or straight line): For connecting different devices (A-a,b-b)
Crossover cable: For connecting the same device (A-B)

Day 04

1. What is the length of MAC address? How many bytes?
MAC address length 48 bits (6 bytes), the first 24 stands for the manufacturer, and the last 24 represents the NIC number

2. Describe the main operating principle of the switch?
The switch receives the data frame, first checks whether the source MAC address of the data frame exists in the MAC address table, does not add;
The destination MAC address of the data frame is present in the Mac surface, and if there is one, it is forwarded directly, not in addition to the source port. Its
After the secondary switch learns the host MAC address corresponding to the port, if the host for this MAC does not participate in communicating this entry for 300 seconds
will be removed and the host MAC address corresponding to the port will be re-learned if a change occurs.

3. What are the types of Cisco and H3C switches that are commonly used today? What is the price?
Product System Unit Price
cisco2960 Series Switches About 5k
CISCO3560 Series switches about 2w
CISCO4500 Series switches about 5w
CISCO6500 Series switches around 20w
(H3C) smb-s1248 48-Port full Gigabit Two-layer non-managed enterprise class
Rack-mounted switch around 1.8k
(H3C) SMB-S1848G-CN 48 Port full Gigabit two Layer network management core 2.3K or so
Switch

4. Can the switch set the gateway? How do I configure the gateway for the switch?
The switch can set the gateway
In global configuration mode: IP default-gateway gateway IP address
The purpose of the switch configuration gateway is to enable computers of different network segments to manage the switch remotely.

Computer network (Network Part II) 3–4 days