（）is not a physical wall， but a lot of virtual data to protect the computer network.
举一反三
- （）is not a physical wall but a flow virtual data to protect the computer network.
- The WDM transmission network consists of three layers: Physical Layer、Data Link Layer and Network Layer.
- _____ cards are used to connect a computer to a network. A: MiniDC B: Network adapter C: Battery D: AC adapter
- The Internet is the （）network of computers all over the world. A: virtual B: only C: physical D: first
- What are key benefits of IBM Systems Director Standard Edition?（） A: Backup data Manage problems Monitor network system B: Report problems Manage servers and virtual environment Monitor the network C: Monitor system health and network Install and manage AIX and IBM i Manage energy consumption D: Monitor system health and network Manage servers and virtual environment Collect performance data