A+, Network+, Security+ Exams in a Nutshell by Pawan K. Bhardwaj

Author:Pawan K. Bhardwaj [Pawan K. Bhardwaj]
Language: eng
Format: epub
Tags: COMPUTERS / Certification Guides / General
ISBN: 9780596551513
Publisher: O'Reilly Media
Published: 2009-02-08T16:00:00+00:00

Topology

The physical setup of a Token Ring network is a star, while the logical setup is in a ring topology. A central device known as Multi-Station Access Unit (MSAU or MAU) is used to create a physical star topology.

Media

The IEEE 802.5 standard defines the use of unshielded twisted pair (UTP) and shielded twisted pair (STP) cables.

IEEE 802.11

The IEEE 802.11 family of standards defines several protocols used for wireless communications. This standard defines all aspects of wireless communications from the frequency range specifications to physical layouts to authentication mechanisms. The original IEEE 802.11 standard is known as legacy 802.11. The characteristics of the IEEE 802.11 standard are as follows:

Speed

The data transfer speed defined in the legacy 802.11 standard was limited to 1 or 2 Mbps within the frequency range of 2.4 GHz. Speeds for other 802.11 standards are discussed later in this section.

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