Motorola AL 200 Panduan Instalasi - Halaman 41

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hub

Hybrid Fiber/Coaxial

(HFC) network

Initial Maintenance (IM) A contention interval that provides an opportunity for modems to join a

Internet

IP address

IP filtering

IP network

Local Area Network

(LAN)

MAC Layer Domain

Maximum Transmission

Unit (MTU)

Mbps

A device used to connect multiple devices to a LAN or similar structure to a

headend.

A network where the trunk of the cable plant is fiber technology. The fiber is

connected to a coaxial cable and the signal is converted so that it is compatible

to that media. The coaxial cable runs through the branches of the network and

is dropped into the subscriber's home.

network.

A collection of interconnected networks used for world-wide communications.

These networks use the TCP/IP protocol.

A 32-bit address assigned to every device in a network. An IP address has two

parts: a network address and a host address. Each network is assigned an

address by a governing agency, and each company administrator assigns an

address to each host. Network addresses can be 8, 16, or 24 bits long

corresponding to classes A, B, and C, respectively, with the host address

occupying the remainder of the 32 bits. If a service provider uses Class C

addresses, for example, the first 24 bits are the network address and 8 bits are

used for host addresses.

An IP network address can be further divided by using classless addressing or

subnetting. See subnet.

IP filtering allows IP packets to be dropped according to information in the

packet, such as its source or destination address. IP filtering can prevent

subscribers from accessing headend servers, enforce subscribers to log on to

the cable network, enforce separately-billed service packages for data, and

provide group access control for IP Multicast.

A group of IP routers that route IP datagrams. These routers are sometimes

referred to as internet gateways. Single users access the IP network from a host.

Each individual network in the Internet includes some combination of hosts

and IP routers.

A privately owned and administered network for data communications. A LAN

provides a relatively high bandwidth over a limited geographical area for

communication among the attached devices, typically personal computers and

servers. Communication is usually accomplished by broadcasting on a

connectionless basis over a shared media.

A collection of upstream and downstream channels for which a single Media

Access Control (MAC) Allocation and Management Protocol operates. Its

attachments include one CMTS and a number of cable modems.

The largest amount of data that can be transmitted in one discrete message on a

physical network. MTUs can be user configurable.

Mega (million) bits per second. A rate of data transfer.

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