Networking Basics
1. Common Equipment
1) physical layer repeater
Reproducing the received signal and a transmission, works only for distance transmission of high-level protocol is transparent, but the limited use number
2) physical layer hub
Multiport repeater
3) Data Link Layer Bridge
The frames between the physical address information forwarding network, can alleviate heavy network traffic, improve efficiency. Into the store and forward bridge may be connected to adapt it to use two different LAN MAC protocol, thus constituting a hybrid network environment mixed together in a different LAN.
4) data link layer switcher
Refers to the traditional switches, multi-port bridge
5) The network layer three switches
Dailu layer 2 switch
6) Network Layer Routers
Information transfer between the logical address through the network, can be completed interoperability between heterogeneous networks, the connection can use the same network protocol subnetwork
7) Multilayer top switch (first layer 4-7)
With protocol conversion switch
8) Gateway executives
The most sophisticated networking equipment, the user connects more network layer protocols to perform different subnets
2.FTP client and server are generally need to establish two connections, a control connection, a data connection
Loopback connection control information and a control command of an FTP server
A data connection for data transfer, the contents of the file transfer is completed
3.100Base-T twisted-pair (Twisted pair-T) transmissions
4. The propagation delay will affect the length of the link
5. In a star topology network, each node is connected by a point to point manner to the central node (also known as a central switching station, a switch or hub typically)
6. LAN