Question Answer
In this chapter you will learn about Hardware devices used for networking
Different types of networks
protocols and standards Windows uses for networking
How to connect a computer to a network
Troubleshooting tools and tips for network connections.
The focus of this chapter is to prepare you so that you can assume total responsibility for supporting both wired and wireless networks in a small-office-home-office(SOHO)environment.
A+ Exam Tip All the sat_flash_1 in this chapter applies toward the networking objectives of the A+ 220-701 Essentials, expects you to know about networking terms, concepts, protocols, and hardware, and how to connect a computer to an existing network
Networking Technologies when two or more computers can communicate with each other
When networks are categorized by size or physical area they cover, these categories are used: PAN(personal area network)-personal devices at close range such as a cell phone, PDA, and notebook
LAN(local area network)-small local area such as a home, office, other building, or small group of building.
WAN(Wireless LAN)-covers a limited geographic
Network Categories(cont'd) MAN-metropolitan area network)-covers a large campus or city
WAN(Wireless area network)-covers a large geographical area and is made up of many smaller networks.
A+ Exam tip The A+220-701 Essentials expects you to know about LAN and WAN
Bandwidth Is the theoretical number of bits that can be transmitted over a network at one time and is measured in bits per second(bps)
Data throughput The actual speed of a network
Latency Delays in network transmissions
Internet Service Provider(ISP) Company that may be used to connect a network to the Internet
A+ Exam Tip A+ 220-701 Essentials exam expect you to be able to compare and contrast these network types: Dial-up,DSL,Cable,Satellite,fiber,802.11,Bluetooth,and cellular
Network Technologies and their Uses
Bluetooth 2.0 Common Uses-Short range wireless technology used for a PAN(personal area network)
Maximum speed-Up to 2 Mbps
GSM Mobile phone service Common Uses-Cellular wireless technology used for voice and data transmission over mobile phones
Maximum speed-Up to 3 Mbps
CDMA Mobile phone service Common Uses-Cellular wireless technology use for mobile phones
Maximum speed-Up to 3 Mbps
G3 mobile phone sevice Common uses-Cellular mobile phone technology allows for transmitting data, video, and text.
Maximum speed-Up to 2.4 Mbps
Wi-Fi 802.11b wireless First 802.11 standard that was widely used but is being replaced by 802.11g and n
Bluetooth 3.0 Common uses-Latest bluetooth standard just released that is not yet available in devices
Maximum speed-Up to 24 Mbps
Wi-Fi 802.11a wireless Common uses-shorter range than 802.11b but is faster
Maximum speed-54 Mbps
Wi-Fi 802.11g wireless Common uses-compatible with and replacing 802.11b
Maximum speed-Up to 54 Mbps
802.16 wireless(WIMAX) Common uses-Offers ranges up to 6 miles
Maximum speed-up to 75 Mbps
802.11n wireless Common Uses-Latest Wi-Fi technology
Maximum speed-Up to 160 Mbps
Wire Networks
Dial-up or regular telephone(POTS,for plain old telephone service) Slow access to an ISP using a modem and dual-up connection
SDSL(Symmetric Digital Subsciber Line) Common Uses-Equal bandwidth in both directions. SDSL is a type of broadband technology.(Broadband refers to a networking technology that carries more than one type of signal, such as DSL and Telephone)
ASDL(asymmetric DSL) Most bandwidth is from ISP to user. Slower versions of ASDL are called ASDL Lite or DSL. ISP customers pay according to a bandwidth scale
Maximum speed-640 Kbps upstream and up to 8 Mbps downstream
Ethernet Slowest Ethernet network, replaced by Fast Ethernet. Variations of Ethernet are used for almost all local networks.
Maximum speed-10 Mbps
Cable Modem Connects a home or small business to an ISP; is usually purchased with cable television subscription. Cable modem is a type of broadband technology that is used in conjunction with television on the same cable.Fiber-optic cable gives highest speeds
Maxim
Dedicated line using fiber optic Dedicated line from ISP to business or home. Speeds vary with price
Maximum speed-up to 20 Mbps upstream and 50 Mbps downstream
T3 Dedicated lines used by large companies that require a lot of bandwidth and transmit extensive amounts of data
Maximum speed-45 Mbps
VDSL(very-high-bit-rate DSL) Lates version of DSL is asymmetric DSL that works only for a short distance
Maximum speed-up to 52 Mbps
Fast Ethernet Used for local networks
Maximum speed-100 Mbps
Gigabit Ethernet Fastest Ethernet standard for a local network
Maximum speed-1 Gbps
10-Gigabit Ethernet Newest Ethernet standard expected to largely replace SONET,OC, and, ATM because of its speed simplicity, and lower cost.
maximum speed-10 Gpbs
OC-1,OC-3,OC-24, up to OC-3072 Optical Carrier Levels(OCx) used for Internet backbones; they use fiber-optic cabling
Maximum speed-52 Mbps, 155 Mbps,1.23 Gbps, 160 Gbps
SONET(Sycnhronous Optical Network) Major backbones built using fiber-optic cabling make use of different OC levels
Maximum speed-up to 160