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IT 280 OSI > Exam 6 > Flashcards

Exam 6 Flashcards

1
Q

(254) What does a dotted quad number look like?

A

It is a format where four numbers, usually in base 10, are connected by
dots. For example, \123.123.123.123”.

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2
Q

(255) When an IPv4 address is written in x.x.x.x format, the possible value for
x range from 0 to what?

A

255

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3
Q

(256) Describe base 2.

A

(a) It is a numbering system. (b) The digits range from 0 to 1. (c) Each
digit represents 1 bit. (d) It is also called binary.

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4
Q

(257) Describe base 8.

A

(a) It is a numbering system. (b) The digits range from 0 to 7. (c) Each
digit represents 3 bits. (d) It is also called octal.

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5
Q

(258) Describe base 10.

A

(a) It is a numbering system. (b) The digits range from 0 to 9. (c) Each digit represents about 3 1/3 bits. (d) It is also called decimal

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6
Q

(259) Describe base 16.

A

(a) It is a numbering system. (b) The digits range from 0 to 9 and A to F.
(c) Each digit represents 4 bits. (d) It is also called hex or hexadecimal.

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7
Q

(260) Describe base 60.

A

(a) It is a numbering system. (b) The digits range from 0 to 59. (c) It is
used for time and angle measurement, including navigation. (d) Because
the digits are multi-character, in writing they are normally separated by
another character.

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8
Q

(261) Describe base 64.

A

(a) It is a coding system. (b) The characters include A-Z, a-z, 0-9, and two others. (c) Each character represents 6 bits. (d) It is used for transmitting
data as though it were text.

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9
Q

(262) Describe base 256.

A

(a) It is a numbering system. (b) It uses multi-character ‘digits’ 0-255.
(c) Each digit represents 8 bits. (d) In writing the digits are normally
separated by dots.

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10
Q

(263) What is an octet?

A

8 bits

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11
Q

(264) How many bits in a byte?

A

8

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12
Q

(265) How many bits a nybble?

A

4

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13
Q

(266) What are the two meanings of kilo?

A

Ten to the third power, and two to the tenth power.

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14
Q

(267) What are the two meanings of meg?

A

Ten to the sixth power. Two to the 20th power.

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15
Q

(268) What are the two meanings of gig?

A

Ten to the ninth power. Two to the 30th power.

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16
Q

(269) Convert binary 11110100010000 to octal

A

36420

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17
Q

(270) Convert binary 11111111011001011001 to hex.

A

FF659

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18
Q

(271) Convert octal 16471 to binary

A

1110100111001

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19
Q

(272) Convert hex 64209 to binary.

A

1100100001000001001

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20
Q

(273) Convert decimal 162 to binary.

A

10100010

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21
Q

(274) Convert binary 10001000 to decimal

A

136

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22
Q

(275) For 19.19.19.19, what class is it?

A

Class A

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23
Q

(276) For 199.199.199.199, what class is it?

A

Class C

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24
Q

(277) What does a net mask look like?

A

32 bits, with all the 1s rst, then all the 0s

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25
(278) In a net mask, what do the 1s mean?
The 1s indicate the part of the address that is the network number.
26
(279) In a net mask, what do the 0s mean?
The 0s indicate the part of the address that is the host number
27
(280) What is the IPv4 special address range for the local network?
0.0.0.0/8
28
(281) What is the Class A Private Address Range?
10.0.0.0/8
29
(282) In the Class A Private Address Range, how many (classful) networks are there?
1
30
(283) In the Class A Private Address Range, what is the rst IP address?
10.0.0.0
31
(284) In the Class A Private Address Range, what is the rst host address?
10.0.0.1
32
(285) In the Class A Private Address Range, what is the last IP address?
10.255.255.255
33
(286) In the Class A Private Address Range, what is the last host address?
10.255.255.254
34
(287) What is the local host Private Address Range?
127.0.0.0/8
35
(288) What is the Link Local (APIPA) Private Address Range?
169.254.0.0/16
36
(289) How are Link Local (APIPA) addresses assigned?
Each computer picks its own.
37
(290) What is the Class B Private Address Range?
172.16.0.0/12
38
(291) In the Class B Private Address Range, how many (classful) networks are there?
16
39
(292) In the Class B Private Address Range, what is the rst IP address?
172.16.0.0
40
(293) In the Class B Private Address Range, what is the rst host address?
172.16.0.1
41
(294) In the Class B Private Address Range, what is the last IP address?
172.31.255.255
42
(295) In the Class B Private Address Range, what is the last host address?
172.31.255.254
43
(296) What is the Class C Private Address Range?
192.168.0.0/16
44
(297) In the Class C Private Address Range, how many (classful) networks are there?
256
45
(298) In the Class C Private Address Range, what is the rst IP address?
192.168.0.0
46
(299) In the Class C Private Address Range, what is the rst host address?
192.168.0.1
47
(300) In the Class C Private Address Range, what is the last IP address?
192.168.255.255
48
(301) In the Class C Private Address Range, what is the last host address?
192.168.255.254
49
(302) What is the IPv4 global broadcast address?
255.255.255.255
50
(303) What does CIDR stand for?
classless inter-domain routing
51
(304) What does CIDR notation look like?
It is written as a slash followed by a number between 0 and 32; for example, /21
52
(305) What is the other name for slash notation?
CIDR notation
53
(306) What is the other name for CIDR notation?
slash notation
54
(307) For 199.199.199.199, what is the default Net Mask in CIDR and dotted quad notation?
/24 and 255.255.255.0
55
(308) For /10, what is the subnet block size?
0.64.0.0
56
(309) For /23, what is the subnet block size?
0.0.2.0
57
(310) For /28, what is the subnet block size?
0.0.0.16
58
(311) For 255.255.248.0, what is the subnet block size?
0.0.8.0
59
(312) What does VLSM stand for?
variable length subnet mask
60
(313) What is a software port?
A port is a number that indicates which computer program should receive the message.
61
(314) Software port numbers range from 0 up to what number?
65535
62
(315) What is port 21 normally used for?
FTP, File Transfer (or Transport) Protocol.
63
(316) What is port 22 normally used for?
SSH, Secure Shell.
64
(317) What is port 23 normally used for?
telnet
65
(318) What is port 25 normally used for?
SMTP, Simple Mail Transfer (or Transport) Protocol
66
(319) What is port 80 normally used for?
HTTP, Hyper Text Transfer (or Transport) Protocol.
67
(320) What is port 443 normally used for?
HTTPS, Hyper Text Transfer (or Transport) Protocol Secure.
68
(321) What is a client?
A computer that makes requests.
69
(322) What is a server?
A computer that answers requests.
70
(323) What is the well-known port number for web servers?
80
71
(324) What is the well-known port number for secure web servers?
443
72
(325) What is the well-known port number for fi le transfer protocol (ftp) servers?
21
73
(326) What is the well-known port number for email servers?
25

IT 280 OSI (6 decks)

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