Q1: How to link the two hosts?
A1: cable, network card, protocol stack
Cable provides the physical media, carrying a bitstream, electrical
Card for data processing, the bit stream data on the disk on the wire conversion
Language as a communication protocol stack, data communication during parsing, address addressing, flow control
Q2: cable is not long enough how to do?
A2: repeater
Is a physical layer repeater product, can relay information and amplification, for example the original transmission device implementing
Q3: repeater port is not enough how to do?
A3: Hubs
Usually only two relay interfaces, meaning that if more than three network terminal host, the data communication can not be achieved between a plurality of host
Hub hub is a multiport repeater, the product is a physical layer, the information can be relayed and amplified, the data received from any port to any other interfaces will be flooded
Hub does not recognize the packet addressing information and an upper layer content, the terminal can not be isolated from the host, multiple hosts started the same collision domain, the network employs a hub, a lower bandwidth utilization
Q4: fear of harassment, how to do?
A4: Bridge
Bridge is a link-layer product, capable of recording the MAC address of the host and the terminal generates a MAC table, the bridge according to the data flows between the host MAC forwarding table
Bridges can be effectively isolated domains conflict, improve bandwidth utilization of the network, the data will not be collisions between different interfaces
Bridge interface is limited, the default is two, the conflict on the network isolation relatively limited
Q5: bridge fast enough how to do?
A5: Switch
Link layer switch is a product capable of recording a host MAC address and the terminal generates a MAC table, the data flows between the host MAC forwarding table
Switches are extended and upgraded on the basis of forward, compared to the bridge, there are several advantages:
the number of interfaces more intensive
ASIC chip using a dedicated high-speed forwarding hardware
VLAN can be isolated
Switch is a local area network products, generally used for local networks, remote wide area network communication can not be achieved
Q6: far enough how to do?
A6: the router
A router is a network layer product, based on the IP address using the routing table forward data
A router is used to connect different LANs (which may be different media, such as Ethernet and token ring), for broadcast domain isolation, it may also be used for remote communication
Q7: wiring trouble how to do?
A7: Wireless AC / AP
Q8: not safe enough how to do?
A8: Firewall
Q9: network congestion how to do?
A9: Flow Control