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CCNA > Chapter 3: Introduction To TCP/IP > Flashcards

Chapter 3: Introduction To TCP/IP Flashcards

1
Q

Port 21

A

FTP

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2
Q

Port 23

A

Telnet

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3
Q

Port 110

A

POP3

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4
Q

Port 53

A

DNS

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5
Q

Port 69

A

TFTP

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6
Q

Port 67

A

BootPS

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7
Q

Port 80

A

HTTP

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8
Q

Port 25

A

SMTP

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9
Q

Port 20

A

FTP

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10
Q

Port 443

A

HTTPS

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11
Q

Port 22

A

SSH

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12
Q

Port 123

A

NTP

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13
Q

Port 143

A

IMAP4

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14
Q

What makes TCP reliable?

A

Sequencing, acknowledgements, and flow control (windowing). UDP does not have reliability.

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15
Q

In the DoD model, what are the two main reasons for the Internet layer’s existence?

A

Routing and providing a single network interface to the upper layers.

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16
Q

Protocol 6

A

TCP

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17
Q

Protocol 17

A

UDP

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18
Q

What does ARP do?

A

ARP resolves IP addresses to Ethernet (MAC) addresses.

19
Q

What is RARP?

A

RARP resolves Ethernet (MAC) addresses to IP addresses.

20
Q

What is the Class A reserved / private address space?

A

10.0.0.0 through 10.255.255.255

21
Q

What is the Class B reserved / private address space?

A

172.16.0.0 through 172.31.255.255

22
Q

What is the Class C reserved / private address space?

A

192.168.0.0 through 192.168.255.255

23
Q

What is the IP range for a Class A network?

A

1-126

24
Q

What is the IP range for a Class B network?

A

128-191

25
Q

What is the IP range for a Class C network?

A

192-223

26
Q

What is the difference between a broadcast, unicast, and multicast address?

A

A broadcast is all devices in a subnet, a unicast is to one device, a multicast is to some but not all devices.

27
Q

What are the key features of TCP?

A

Sequenced, Reliable, Connection-Oriented, Virtual circuit, Acknowledgements, Windowing flow control

27
Q

What are the key features of UDP?

A

Unsequenced, Unreliable, Connectionless, Low overhead, No acknowledgement, No windowing or flow control of any type

27
Q

What are the key protocols that use TCP?

A

Telnet, SMTP, HTTP, FTP, DNS, HTTPS, SSH, POP3, NTP, IMAP4

27
Q

What are the key protocols that use UDP?

A

SNMP, TFTP, DNS, BootPS/DHCP

28
Q

What are the four layers of the DoD model?

A

Process/Application
Host-to-Host
Internet
Network Access

29
Q

The Process/Application layer defines:

A

Node-to-node application communication and also controls user-interface specifications

30
Q

The DoD host-to-host layer parallels which OSI layer?

A

The Transport Layer

31
Q

The DoD Internet layer parallels which OSI layer?

A

The Network Layer

32
Q

The DoD Network layer parallels which OSI layer?

A

Data Link and Physical Layers

33
Q

What protocols reside in the Host-to-Host layer?

A

TCP/UDP

34
Q

Which protocols reside at the DoD Internet layer?

A

ICMP/ARP/RARP/IP

35
Q

Which protocols reside at the DoD Network Access layer?

A

Ethernet/Fast Ethernet/Token Ring/FDDI

36
Q

What is contained in the TCP header of a connection oriented transmission?

A

Source port. Destination port, sequence number, acknowledgement number, header length, future use field, window size, checksum, urgent pointer, options field, and finally data.

37
Q

What is contained in the UDP header of a connectionless transmission?

A

Source port, destination port, length, checksum and data.

38
Q

What is in the IP header?

A

Version, header length, priority or type of service, total length id, flags, fragment offset, time to live, protocol, header checksum, source IP address, dest address, options, data

39
Q

On which layer is ICMP?

A

Network

40
Q

What is the 127.0.0.1 address used for?

A

Loop back and testing

CCNA (9 decks)

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