OSI

Question 1

Physical layer specifications

Answer 1

Pin layouts
Voltages
Cable specifications
Hardware: hubs, repeaters, and network interfaces

Question 2

Data in the Network Layer is broken down into these

Answer 2

Packets

Question 3

Compression happens in this layer

Answer 3

Presentation (Layer 6)

Question 4

Connectionless communications
Connection-oriented communications
Flow control
Windowing
Acknowledgements

Answer 4

Transport Layer (Layer 4) specifications

Question 5

POP3, IMAP, SMTP, Web Browsing (HTTP), Domain Name Service (DNS), File Transfer Protocol (FTP), TELNET, Simple Network Management Protocol (SNMP) are all examples of what layer

Answer 5

Application (Layer 7)

Question 6

Logical Link Control

Answer 6

Data Link Layer

Question 7

Ensures every host on the network has a unique address

Answer 7

Logical addressing

Question 8

Sets up, manages, and tears down sessions between Presentation Layer entities
Provides dialogue control between devices
Coordinates communication between systems

Answer 8

Session Layer (Layer 5)

Question 9

Layer 3

Answer 9

Network

Question 10

Hierarchy layers

Answer 10

OSI

Question 11

BGP

Answer 11

Border gateway protocol

Question 12

Primarily responsible for getting data from one end-point to another

Answer 12

Network Layer

Question 13

Routing protocol used to transfer data and information between gateways or autonomous systems

Answer 13

BGP (Border Gateway Protocol)

Question 14

Communicates directly with the media that transmit bits

Answer 14

Physical

Question 15

Layer 7

Answer 15

Application

Question 16

Layer 4

Answer 16

Transport

Question 17

EPL

Answer 17

Ethernet Private Line

Question 18

Layer 2

Answer 18

Data Link

Question 19

Layer 1

Answer 19

Physical

Question 20

Ensures that data transferred from one system’s Application Layer can be read by the Application Layer on the receiving system

Answer 20

Presentation (Layer 6)

Question 21

Transfers Ethernet frames from one customer site to another within the Comcast or partner carrier network

Answer 21

EPL (Ethernet Private Line)

Question 22

OSI

Answer 22

Open Systems Interconnection

Question 23

Media Access Control (MAC)

Answer 23

Data Link Layer

Question 24

Routers fall into this layer

Answer 24

Layer 3 (Network Layer)

Question 25

Logical device addressing Tracking location of devices on the network Determining best path for moving data

Answer 25

Network Layer

Question 26

Layer 6

Answer 26

Presentation

Question 27

MPEG (Moving Picture Experts Group) - encoding and compression of audio and video data SSL (Secure Sockets Layer) - encryption for data transmitted on the internet

Answer 27

Presentation (Layer 6)

Question 28

IPV4

Answer 28

Internet protocol version 4

Question 29

End-to-end transport services Establishment of logical connection between sending and destination hosts Flow Control Error recovery

Answer 29

Layer 4 (Transport)

Question 30

Defines electrical and physical specification of devices and relationship between devices and transmission media

Answer 30

Physical

Question 31

Segments and reassembles data from the upper layers

Answer 31

Transport (Layer 4)

Question 32

Data translation and code formatting

Answer 32

Presentation (Layer 6)

Question 33

Oversees movement of data in and out of the communication path using Frames

Answer 33

Data Link Layer

Question 34

IP (Internet Protocol) ICMP (Internet Control Message Protocol) RIP (Router Information Protocol)

Answer 34

Layer 3 (Network Layer)

Question 35

Presents data to the application layer

Answer 35

Presentation (Layer 6)

Question 36

Encryption and Decryption

Answer 36

Presentation Layer (Layer 6)

Question 37

Comcast Business Ethernet falls under this layer

Answer 37

Layer 2 (Data Link)

Question 38

Identifies where data is headed and where it came from

Answer 38

Data Link Layer

Question 39

Known as "Protocol Layer"

Answer 39

Data Link Layer

Question 40

Sends and receives bits on the network

Answer 40

Physical

Question 41

Layer 5

Answer 41

Session

Question 42

Ensures that an application's data is separate from other users' applications' data

Answer 42

Layer 5