Chap.4 Ip Network; Network Types; Network Devices - Vivotek IP Surveillance Overview

Chap.4 IP Network

Chap.4
IP Network

4.1 Network Types

As the most popular LAN technology, Ethernet uses a number of wiring to build the connection between end
systems and the network. The most common type of Ethernet cables is RJ45. The original Ethernet transfer rate
was 10Mbps. With bandwidth demand increasing, higher transfer rates such as 100Mbps, 1Gbps and 10Gbps
were developed.
Currently, different Ethernet standards can be universally recognized as a form of "100BaseT". The first number
stands for the transfer rate and the last number or character indicates the characteristics of the transmission
medium. For example, 100BaseT is 100 Mbps over network cable.
Ethernet Cable RJ45

4.2 Network Devices

Hub
A hub is a network device that connects a PC with an Ethernet cable to establish a LAN and enables the PC to
communicate with other PCs on the LAN. When data is sent from a PC to a hub, the hub will duplicate the data to
all PCs on the LAN. Only the destination PC will keep the data; other PCs will abandon the data.
Switch
A switch is a network device that serves the same purposes as hubs, but it makes more efficient use of bandwidth
resources. A switch identifies the destination of data by its MAC address and sends it to the designated PC only,
thereby reducing interference between data.
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