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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
Q

(278) In a net mask, what do the 1s mean?

A

The 1s indicate the part of the address that is the network number.

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26
Q

(279) In a net mask, what do the 0s mean?

A

The 0s indicate the part of the address that is the host number

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27
Q

(280) What is the IPv4 special address range for the local network?

A

0.0.0.0/8

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28
Q

(281) What is the Class A Private Address Range?

A

10.0.0.0/8

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29
Q

(282) In the Class A Private Address Range, how many (classful) networks are
there?

A

1

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30
Q

(283) In the Class A Private Address Range, what is the rst IP address?

31
Q

(284) In the Class A Private Address Range, what is the rst host address?

32
Q

(285) In the Class A Private Address Range, what is the last IP address?

A

10.255.255.255

33
Q

(286) In the Class A Private Address Range, what is the last host address?

A

10.255.255.254

34
Q

(287) What is the local host Private Address Range?

A

127.0.0.0/8

35
Q

(288) What is the Link Local (APIPA) Private Address Range?

A

169.254.0.0/16

36
Q

(289) How are Link Local (APIPA) addresses assigned?

A

Each computer picks its own.

37
Q

(290) What is the Class B Private Address Range?

A

172.16.0.0/12

38
Q

(291) In the Class B Private Address Range, how many (classful) networks are
there?

39
Q

(292) In the Class B Private Address Range, what is the rst IP address?

A

172.16.0.0

40
Q

(293) In the Class B Private Address Range, what is the rst host address?

A

172.16.0.1

41
Q

(294) In the Class B Private Address Range, what is the last IP address?

A

172.31.255.255

42
Q

(295) In the Class B Private Address Range, what is the last host address?

A

172.31.255.254

43
Q

(296) What is the Class C Private Address Range?

A

192.168.0.0/16

44
Q

(297) In the Class C Private Address Range, how many (classful) networks are
there?

45
Q

(298) In the Class C Private Address Range, what is the rst IP address?

A

192.168.0.0

46
Q

(299) In the Class C Private Address Range, what is the rst host address?

A

192.168.0.1

47
Q

(300) In the Class C Private Address Range, what is the last IP address?

A

192.168.255.255

48
Q

(301) In the Class C Private Address Range, what is the last host address?

A

192.168.255.254

49
Q

(302) What is the IPv4 global broadcast address?

A

255.255.255.255

50
Q

(303) What does CIDR stand for?

A

classless inter-domain routing

51
Q

(304) What does CIDR notation look like?

A

It is written as a slash followed by a number between 0 and 32; for
example, /21

52
Q

(305) What is the other name for slash notation?

A

CIDR notation

53
Q

(306) What is the other name for CIDR notation?

A

slash notation

54
Q

(307) For 199.199.199.199, what is the default Net Mask in CIDR and dotted
quad notation?

A

/24 and 255.255.255.0

55
Q

(308) For /10, what is the subnet block size?

56
Q

(309) For /23, what is the subnet block size?

57
Q

(310) For /28, what is the subnet block size?

58
Q

(311) For 255.255.248.0, what is the subnet block size?

59
Q

(312) What does VLSM stand for?

A

variable length subnet mask

60
Q

(313) What is a software port?

A

A port is a number that indicates which computer program should receive
the message.

61
Q

(314) Software port numbers range from 0 up to what number?

62
Q

(315) What is port 21 normally used for?

A

FTP, File Transfer (or Transport) Protocol.

63
Q

(316) What is port 22 normally used for?

A

SSH, Secure Shell.

64
Q

(317) What is port 23 normally used for?

65
Q

(318) What is port 25 normally used for?

A

SMTP, Simple Mail Transfer (or Transport) Protocol

66
Q

(319) What is port 80 normally used for?

A

HTTP, Hyper Text Transfer (or Transport) Protocol.

67
Q

(320) What is port 443 normally used for?

A

HTTPS, Hyper Text Transfer (or Transport) Protocol Secure.

68
Q

(321) What is a client?

A

A computer that makes requests.

69
Q

(322) What is a server?

A

A computer that answers requests.

70
Q

(323) What is the well-known port number for web servers?

71
Q

(324) What is the well-known port number for secure web servers?

72
Q

(325) What is the well-known port number for file transfer protocol (ftp) servers?

73
Q

(326) What is the well-known port number for email servers?

IT 280 OSI (6 decks)

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