1- When purchasing a Hard Drive, hard drive specifications must be looked at and
ID: 3692548 • Letter: 1
Question
1- When purchasing a Hard Drive, hard drive specifications must be looked at and understood. Here is an example specification of a Hard Drive. Look at these specifications and answer the following question:
Model
WD1600JSRTL
Interface
SATA 3.0Gb/s
Capacity
160GB
RPM
7200 RPM
Cache
8MB
Average Seek Time
8.9ms
Average Latency
4.2ms
Form Factor
3.5"
2- Define in user friendly terms what the above specifications mean and why they are important. Do not use these specifications in your table!
Specification
Definition
(what does it mean)
Why it is important
Interface
Capacity
RPM
Cache
Average Seek Time
Form Factor
3- Describe three (3) differences between an EIA-232 serial bus and the legacy (LPT) parallel bus.
4- Describe three (3) differences between USB and FireWire (IE1394)?
5- Give 3 technical differences between Wireless (802.11) and Bluetooth? Be specific.
6- Give 2 differences and 2 similarities between eSATA and USB
Model
WD1600JSRTL
Interface
SATA 3.0Gb/s
Capacity
160GB
RPM
7200 RPM
Cache
8MB
Average Seek Time
8.9ms
Average Latency
4.2ms
Form Factor
3.5"
Explanation / Answer
3)
Describe three (3) differences between an EIA-232 serial bus and the legacy(LPT) parallel bus
.EIA-232 serial
busLPT parallel busRAS-232DB 9 connector has 9 pinswhile RAS-232DB25 connector has 25pins
Bidirectionalmaximum data rate is 20kb/s
8 bits are transmitted over a single communication line 1 bit at a time, which makes it slower but moreeffective over long distances
LPT parallel bus
LTP connector has 25 pins
Unidirectional Bus maximum possible transfer rate is 150 kbps
8 Bits are transmitted parallel to eachother. This makes it faster than EIA232but less effective over long distances.
4)
Describe three (3) differences between USB and FireWire (IE1394)?
USB
Uses “Master Slave” architecture
Max number of devices supported 127
Data transfer rate for USB2.0 is 480Mbps
FireWire
Uses “Peer to Peer” architecture
Max number of devices supported 63
Data transfer rate for FireWire 800 is
800Mbps
5)
Wireless 802.11 max speed 2 Mbit/sWireless 802.11a max speed 54 Mbit/sWireless 802.11b max speed 11 Mbit/sWireless 802.11g max speed 54 Mbit/sWireless 802.11n max speed150 Mbit/sBluetooth 1.0 has a Max transfer speed of 1 Mbps and Bluetooth 2.0 has a Max transferspeed of 3 Mbps802.11 has a Maximum range of 100 meters.802.11a has a Maximum range of 120 meters.802.11b has a Maximum range of 140 meters.802.11g has a Maximum range of 140 meters.802.11n has a Maximum range of 240 meters.
Class 1 has a Maximum range of 100 meters.
Class 2 has a Maximum range of 10 meters.
Class 3 has a Maximum range of 1 meter
.802.11 supports a wide range of technologies and protocols.
802.11 supports LAN, WAN and PAN
.802.11 can connect more than 8 active devices together and a limit to max connectionsis set by the manufacturer of the device.
Bluetooth only supports PAN(Personal Area Networking) and can only connect to up to8 active devices
6)
eSATA
Max cable length is 2 meters
Does not provide power to device from cable external
USB
Max cable length is 5 meters
USB can provide power to external device. 5V
They Both are Hot Pluggable(Hot swappable)They Both Use the Serial Bus(one bit at a time
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