TEJ Part 1 Test - Binary Number System

One's Complement rules:

- complement the second number. - then add - if there is a carry bit ø, add it to the answer; positive. - if theres no carry bit o, then complement the answer; negative.

Two's Complement rules:

- compliment the second number - add 1 - change it to addition (reset the equation on another side) - if there is a carry bit ø; positive - if there is no carry bit o, compliment the answer, add 1; negative.

Decimal to Binary rules:

- divide by 2 and record each remainder (decimal numbers i.e. 0.25) 0 /2 = 1 1 /2 = 1 3 /2 = 1 7 /2 = 0 14 /2 = 0 28 /2 = 0 56 /2 = 111000

ASCII development:

- for computers to use one language instead of multiple different sets of 8-bit patterns; - built today on the 8-bit standard code.

Binary Addition rules:

0 + 0 = 0 0 + 1 = 1 1 + 0 = 1 1 + 1 = 0 (and 1 carry bit)

#k or Kilo

1,000

#M

1,000,000

Why is a subnet mask required when configuring TCP/IP settings?

1. How many bits have been chosen for the network. 2. How the IP address is to be interpreted.

What is the transfer rate on a 1.5 MBps DSL link?

1.5MBps > bps 1,500,000 bps / 8 = 187,500 Bps / 1,000 = 187.5 KBps

What is 1000 bits actually equal to?

1024 bits because its not in base 2, only base 10.

What is the transfer rate on a 3 MBps cable modem link?

3 MBps > bps 3,000,000 bps / 8 = 375,000 Bps / 1,000 = 375KBps

Binary to decimal

512, 256, 128, 64, 32, 16, 8, 4, 2, 1

What is the maximum transfer rate (in KBps) using a 56 KBps dial-line up?

56KBps > bps 56,000 bps / 8 = 7,000 Bps / 1,000 = 7 KBps

1 Byte

8 bits

What is a Utility?

Is a system software to help analyze, configure, optimize or maintain a computer.

Dotted-decimal notation:

a system of representing numbers that is different from the common conventions in arithmetic. A 32 number group separated into 4 containers containing 8 bits.

IP Address:

a unique string of numbers separated by periods that identify each computer using the Internet Protocol to communicate over a network. Dotted-decimal notation that identifies a computer.

bits:

the smallest unit of data in a computer with a single binary value of either 1 or 0. Bits are designed to store data and execute instructions.

Binary:

used in mathematics and digital electronics. Binary consists of 1s and 0s - ON or OFF.

Byte:

(8 bits) is one unit of memory e.g., one key stroke. Bytes can range from (00000000) 8 zeros to (11111111) 8 ones, creating 256 combinations with decimal values ranging from 0 to 255.

What is ASCII?

American Standard Code for Information Interchange

What is an example of a utility? How does it work?

McAfee VirusScan is an antivirus computer utility in which scans and blocks suspicious material and determines its risk to help keep your computer secure.

What is a Loopback Address?

The loopback address is a special IP number (127.0.0.1) that is used for the software loopback interface of a machine. The loopback interface has no hardware associated with it, and it is not physically connected to a network.

Boolean logic:

is a form of algebra in which all values are reduced to either TRUE or FALSE. Boolean logic fits nicely with the binary numbering system, in which each bit has a value of either 1 or 0.

Subnetwork mask:

is a mask used to determine what subnet an IP address belongs to.

Decimal:

is a system of writing numerals that assigns a 4-digit binary code to each digit 0-9 in base 10 decimal value.