3Com Switches/Hub Технический паспорт - Страница 2

Просмотреть онлайн или скачать pdf Технический паспорт для Переключатель 3Com Switches/Hub. 3Com Switches/Hub 8 страниц. 3com switches/hub specification sheet

Печатать страницу

O F F I C E C O N N E C T

S W I T C H E S A N D H U B S

Technology Explained

OfficeConnect Family

The 3Com OfficeConnect family offers

the most flexible, expandable, and

integrated networking solutions for

small businesses.

OfficeConnect products include:

LAN connectivity

• Network interface cards

• Switches and hubs

• Networking kits

• HP JetDirect print servers

Remote access and Internet connectivity

• LAN modems

• Cable modems

• Internet firewalls

Network server family

• Network storage servers

• 3Com Internet server

Ethernet technology

Using twisted-pair cables, you can

connect a maximum of four Ethernet

(10 Mbps) hubs in series between

workstations, or between a workstation

and a nonrepeater piece of equipment

(such as a switch). Each cable must

not exceed 100 m (328 ft).

Since its inception, Ethernet has become

the most popular topology in LANs.

Based on the IEEE 802.3 standard,

Ethernet has evolved over the years

and now supports a range of media

and significant enhancements that

the original standard never did. The

10 Mbps available bandwidth can be

either shared across a number of users

using hubs or dedicated to worksta-

tions using switched technology.

Switch or Hub?

With a hub, all users share the same

bandwidth. This works well with a few

users and low traffic requirements, but

as you add users or implement more

bandwidth-hungry software applica-

tions, competition for bandwidth can

start to slow down traffic on the LAN.

Switches are more appropriate when

you need greater network performance

of a high-speed server uplink, such as

when connecting users to a few hubs

or servers, or when connecting many

power users. A switch improves perfor-

mance and shortens network response

times by reducing the number of

users per segment. A switch does that

by providing dedicated bandwidth to

every device—server, PC, or hub—

connected to one of its ports.

Example:

10 Mbps link