Download PDF by Gilbert Held: Securing Wireless LANs: A Practical Guide for Network

By Gilbert Held

Instant LANs will allow small groups and groups to speak through their cellular units with no cables. This new know-how will facilitate conversation in small businesses/teams equivalent to in hospitals, on building websites, warehouses, etc.Held offers a complete consultant to the implementation, making plans and tracking of all facets of instant LAN safety in small offices/small to medium company (SMBs).Securing instant LANs is well timed in addressing the safety problems with this significant new know-how and equips its readers with the instruments they should make the precise selection for his or her personal situation.This excellent creation to instant LAN know-how: * presents a huge review of the entire various concerns and functional advice of the way to make instant LANs safe at domestic in addition to in small places of work * Explains tips on how to computer screen instant LANs, configure forms of instant gear * Discusses which applied sciences are most sensible for various occasions and necessities * supplies useful tricks and recommendation on how one can enforce them

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Additional info for Securing Wireless LANs: A Practical Guide for Network Managers, LAN Administrators and the Home Office User

Example text

2, is similar to other vendor products in that it consists of a PCI adapter card onto which a PC Card containing the wireless NIC is mounted. 2 you will note that the PCI board connectors are inserted into a system expansion slot, thus indicating that the photograph of the board is actually upside down to show the vendor logo. You can also note the black edge on the right portion of the illustration that represents the antenna that will protrude from the rear of a system expansion unit. 2 Most vendors fabricate a PCI bus based NIC by mounting a PC Card onto a PCI adapter card (photograph courtesy of SMC Networks).

1 Frame formats Like wired LANs, wireless LANs transport information in protocol data units referred to as frames. 11 wireless LANs operate at the second layer in the OSI Reference Model, the data link layer, with each frame containing a header, a variable length body, and a trailer in the form of a 32 bit cyclic redundancy code contained in a Frame Check Sequence (FCS) field. In this section we will first look at the format of the basic wireless LAN frame and the composition and use of the fields in that frame.

We will first focus upon the three types of frames supported by the standard and the fields within different types of frames. As we examine the fields within the data frame we will note why the standard is restricted to supporting only one type of encryption which some people consider to represent a design flaw. In the second section we will turn our attention to basic security operations. In book preview 33 this section we will discuss and illustrate the role of the Service Set ID (SSID) as a password and obtain an overview of how WEP operates and is enabled.

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