CDN Oracle Virtual network Technology Network security

1.CDN

The principle is to avoid the internet will affect data transmission speed and stability of the link, make access faster.

The goal is to give users access to the nearest data, improve Internet speed and solve the problem of network congestion.

Characteristics

Bandwidth optimization

Cluster anti-attack effectively prevents hackers from DDoS attacks

Remote acceleration speeds up remote access

Local cache acceleration to increase access speed and stability for enterprise sites

2.oracle

Three kinds of backup

1. Import and export backup (exported output)

2. Cold Backup

Advantages

Quick Backup

Quick Archive

Can be combined with archiving to restore the database to the best

Easy to recover to a certain point in time

Low maintenance, high safety

Disadvantages

You must shut down the database in order to make a backup

During the backup process, the database is not allowed to do other work

cannot be recovered by table and user

3, Hot Backup

Advantages

In the backup time, the database is available for other work

Can be recovered by table or user

Short backup times

Can reach a point-in-time recovery of seconds

Disadvantages

Can't go wrong, or the problem will be very serious

Backup is unsuccessful and cannot be restored to a point in time

3. Virtual Network Technology

1.vlan

IP-based Port-based technology for MAC addresses

Limit broadcast to the scope of each virtual network, thus reduce the transmission of broadcast packets across the network, and improve the transmission efficiency of the network.

at the same time, the virtual network can not communicate directly, but must be forwarded through the router, for advanced security control to provide the possibility, enhance the network security of the network.

4. Network security

Network Information Security Network software Security Network equipment security

Protect data availability integrity and confidentiality by taking technical and management measures

1. Web software to be updated to prevent bugs from being updated to leave a trap for hackers

2. Network information to be encrypted

3. Network equipment

CDN Oracle Virtual network Technology Network security