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CCNA > OSI Model > Flashcards

OSI Model Flashcards

1
Q

What is Layer 1?

A

Physical Layer

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2
Q

What is Layer 2?

A

Data Link Layer

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3
Q

What is Layer 3?

A

Network Layer

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4
Q

What is Layer 4?

A

Transport Layer

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5
Q

What is Layer 5?

A

Session Layer

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6
Q

What is Layer 6?

A

Presentation Layer

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7
Q

What is Layer 7?

A

Application Layer

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8
Q

Physical

PDU & Description

A

Bit: Transmission and reception of raw bit streams over a physical medium

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9
Q

Data Link

PDU & Description

A

Frame: Reliable transmission of data frames between two nodes connected by a physical layer

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10
Q

Network

PDU & Description

A

Packet: Structuring and managing a multi-node network, including addressing, routing and traffic control

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11
Q

Transport

PDU & Description

A

TCP: Segment
UDP: Datagram

Reliable transmission of data segments between points on a network, including segmentation, acknowledgement and multiplexing

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12
Q

Session

PDU & Description

A

Data: Managing communication sessions, i.e. continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes

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13
Q

Presentation

PDU & Description

A

Data: Translation of data between a networking service and an application; including character encoding, data compression and encryption/decryption

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14
Q

Application

PDU & Description

A

Data: High-level APIs, including resource sharing, remote file access

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15
Q

Physical (Example)

A

Signals

  • Electrical
  • Radio
  • Optical
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16
Q

Data Link (Example)

A

Ethernet Frames

MAC Address

17
Q

Network (Example)

A

IP Address

18
Q

Transport (Example)

A

TCP\UDP Ports

19
Q

Session (Example)

A

NETBIOS\RPC

20
Q

Presentation (Example)

A

“Thisisastring\0”

21
Q

Application (Example)

A 
FTP
HTTP
DNS
DHCP
Telnet

CCNA (2 decks)

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