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Network+ > OSI/TCP/IP Related > Flashcards

OSI/TCP/IP Related Flashcards

1
Q

What devices operate at layer 1 of the OSI model?

A

Cabling and Hubs

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2
Q

What is the associated PDU at layer 1?

Bit
Segment
Datagram
Packet
Frame

A

Bit

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3
Q

How long is a MAC address?

48 bits
48 bytes
12 hexadecimal characters
56 megabytes

A

Both 48 bits and 12 hexadecimal characters

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4
Q

What is encapsulation?

A

Putting a “wrapper” around data for easier transmission

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5
Q

What does FCS stand for?

A

Frame Check Sequence

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6
Q

What pieces encompass a frame?

Destination MAC address
Source MAC address
Destination IP
Source IP
Port
FCS

A

Destination MAC address
Source MAC address
FCS

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7
Q

How does the FCS verify that the receiving NIC received the data intact?

A

Cyclic redundancy check

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8
Q

What is the maximum size of a traditional frame?

A

1500 bytes

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9
Q

What devices operate at layer 2 of the OSI model?

A

NIC
Switch

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10
Q

What are the two major “jobs” of a NIC?

A

LLC
MAC

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11
Q

What does the LLC do in a NIC?

A

Handles flow control
Talks to the operating system (via drivers)

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12
Q

What is the PDU at layer 3 of the OSI model?

A

Packets

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13
Q

What is the PDU used at layer 4 of the OSI model?

A

Segment

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14
Q

What are the primary functions of the Transport Layer?

A

Segmentation/reassembly

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15
Q

What is included in a TCP Segment?

A

Source Port
Destination Port
Sequence Number
Acknowledgement Number

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16
Q

What is the range of available ports?

A

1-65,536

17
Q

What is included in a UDP datagram?

A

Source Port
Destination Port
Length
Checksum

18
Q

What does layer 5 of the OSI model do?

A

Session tracking/naming

19
Q

What happens at layer 6 of the OSI model?

A

Data conversion
Defines how two devices should encode, encrypt, and compress data.

20
Q

What are the layers of the TCP/IP Model?

A

Application
Transport
Network
Network Access

Network+ (13 decks)

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