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
Web software to be updated to prevent bugs from being updated to leave a trap for hackers
Network information to be encrypted
Network equipment
CDN Oracle Virtual network Technology Network security