- 업종: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A computer that (a) acts as an interface between two networks (e.g., the Internet and an private network, respectively,) and (b) regulates traffic between those networks for the purpose of protecting the internal network from electronic attacks originating from the external network. The firewall is capable of handling the following tasks: (a) isolating internal and external traffic (a bridge service); (b) making internal addresses invisible and directly unaccessible from outside and passing through authorized traffic after proper checking (a proxy service); (c) facilitating protected (encrypted) connections to cooperative parties over public networks (a tunneling service); (d) filtering outgoing traffic for security and network usage rules (filtering or monitoring service); (e) filtering incoming traffic for rogue data (viruses, spam, inappropriate data (filtering,) or improper actions (port scanning, overload prevention, etc. ; (f) blocking forbidden external services or addresses (blocking, "network nanny"-functions); (g) providing log-in services for authorized outside users and simulating the approved outside user as an inside user (proxy, log-in server); (h) caching network traffic (cache service); (i) converting between different network protocols on different protocol levels (bridge when handling lower level protocols, gateway when handling higher level protocols); (j) traffic diverting (e.g., for cost optimizing, accounting, network planning, monitoring); (k) providing consistent, open entry to the internal network (portal service) and facilitating public network address and connection sharing (proxy service. ) 2. A system designed to defend against unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Synonyms front-end security filter, proxy.
Industry:Telecommunications
A computer that (a) is controlled by internally stored instructions, (b) can synthesize and store instructions, and (c) can subsequently execute those instructions.
Industry:Telecommunications
A computer that connects two or more electronic mail systems (especially dissimilar mail systems on two different networks) and transfers messages between them. Note: The mapping and translation can be quite complex, and can require a store-and-forward scheme whereby the message is received from one system completely before it is transmitted to the next system after suitable translations.
Industry:Telecommunications
A computer that consists of one or more central processing units (CPUs,) that is controlled by internally stored programs, and that stores and processes data in digital form.
Industry:Telecommunications
A computer that has a single arithmetic and logic unit. 2. A computer, some specified characteristic of which is serial; for example, a computer than manipulates all bits of a word serially.
Industry:Telecommunications
A computer that has multiple arithmetic units or logic units that are used to accomplish parallel operations or parallel processing.
Industry:Telecommunications
A computer that has two or more processors that have common access to a main storage.
Industry:Telecommunications
A computer that is connected to more than one physical data link; these data links may or may not be attached to the same network.
Industry:Telecommunications
A computer that is designed to operate on a restricted class of problems.
Industry:Telecommunications
