By Pawan K. Bhardwaj
A+, Network+, and protection+ certifications are well-known during the because the normal for proving foundation-level IT ability units. A+, community+ and safeguard+ assessments in a Nutshell offers precisely what skilled pros have to go one or all of those CompTIA certification checks. it really is an all-in-one evaluate source that boils down very important ideas and methods and offers the knowledge in an accessable layout. furthermore, learn notes and perform sections aid construct wisdom and get ready readers for the unforeseen. together with assurance of the A+ 2006 assessments, this can be the only ebook that would stack the deck on your desire.
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Extra resources for A+, Network+, Security+ Exams in a Nutshell
Serial. A standard serial port has a 9-pin socket and the connector is 9-pin D-sub. Some other forms of serial interfaces include USB and Firewire. Serial cables are of two types: standard and null modem. Table 2-1 lists some common configurations of serial cables. Table 2-1. Serial cable configurations Cable type Standard modem cable Null modem cable Null modem cable Serial extension cable Standard serial cable or extension cable First connector DE-9 Female DB-25 Female DE-9 Female DE-9 Female DB-25 Female Second connector DB-25 Female DB-25 Female DE-9 Female DE-9 Male DB-25 Male Personal Computer Components | 37 RJ-Series.
A biometric device measures the physical characteristics (fingerprints, eye retina scan, or voice patterns) of a person for the purpose of identification. The information collected by the biometric device is sent to the computer for processing. The computer matches the input from a biometric device and compares it with its database to grant or deny access to the person. Touch screen. Touch screens are considered a replacement for a standard keyboard and a mouse. A user can simply touch the screen, which translates the user’s actions into electrical signals.
Communications and Networking Riser (CNR) CNR has 60 pins and is mainly used to enhance the built-in capabilities of the motherboard by installing additional components. Industry Standard Architecture (ISA) ISA is the oldest type of expansion slot on motherboards. This black-colored slot is long in shape and has two parts: one small and the other long. ISA slots are hardly visible in modern motherboards. You might find that some old motherboards have both ISA and PCI slots. Floppy disk and hard disk connectors.
A+, Network+, Security+ Exams in a Nutshell by Pawan K. Bhardwaj