O'Reilly logo

CCENT Quick Reference Sheets by Jim Doherty, Eric Rivard

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Section 7. Extending the LAN

Exploring Wireless Networking

In recent years, business's need for network mobility has made wireless LANs (WLANs) common in today's networks. Unlike wired LANs, wireless devices transmit and receive data using radio frequencies (RF) or infrared signals. These frequencies or signals are sent through an access point (AP).

The AP is like a hub or switch on a wired LAN and is the connectivity point for all wireless devices to access the network.

WLANs are based on IEEE standards that define physical and data-link specifications. Because the standards define Layer 1 and Layer 2 specifications, higher-layer protocols such as IP and IPsec can function on WLANs.

The IEEE standards on WLANs, such as 802.11a/b/g, use unlicensed ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required