Layer 2 protocol gateway

Application

gateway in the application network seven-layer protocol:

OSI is an open access system interconnect reference model, he is a definition very well Agreement specification. The OSI model has a 7-layer structure, and there are several sub-layers per layer.

I simply introduce these 7 layers and its functions.

OSI 7 layers from top to bottom are

7 application layer

6 representation layer

5 session layer

Layer 2 protocol gateway

4 Transportation Layer

3 Network Layer

2 Data Link Layer

1 Physical Layer

Among them, The 7, 6, 5, and 4 layers define the functions of the application, the following 3, ie 3, 2, 1 layer mainly facing the end-to-end data stream through the network.

The security gateway has a firewall figure on the application layer and the network layer, and the VPN function can be seen on the third floor. The safe gateway of the anti-drug wall acts in the second layer. According to the seven-layer level limit, the high-level agreement can take the principle of the low-level agreement, and the development of the security gateway is going to the line of the high-level agreement.

The difference between the gateway and the router:

The gateway is an IP access to the router, and other computers must be able to access routers with an IP segment of the gateway, such as routers. The IP is 192.168.0.1 (this is the gateway) is also the address necessary for the router. Other hosts must also be 192.168.0.x (any number between 2-254) so ‚Äč‚Äčthat the router can be accessed, which is said to go online. The gateway address on the computer will be filled in 192.168.0.1

characteristics

Intelligent access

Products Support ADSL, fiber, etc. Wideband access scheme, Flexible expansion bandwidth and inexpensive access. Enter the company to solve the flexible expansion of bandwidth and inexpensive access. Access to the company via routing, NAT, multi-link multiplexing and detection.

Health Network

Products provide a full range of local area network access security management solutions through its own firewall, anti-virus, intrusion detection, user access active certification. Provide a full range of local area network management solutions through its own DHCP server, ARP firewall, DDNS and other functions.

Mobile Office

The VPN function of SSLVPN, IPSec, PPTP, L2TP, etc., allows users to use one-click operation, convenient and easy to create low-quality wide area online Special network provides enterprises to provide WAN security business transmission channels, facilitating corporate headquarters and mobile staff, branches, partners, product suppliers, customers, improvement, customers, customers, suppliers and partners Conduct business.

Inhibition of

Dynamic intelligent bandwidth management function, only one-time setting, automatically suppress the bandwidth user, easy to solve the bandwidth of BT, P2P and video movies.

Related Articles
TOP