Network Models CH 2 Flashcards
OSI and TCP/IP models are two tools that provide what for a IT professional?
- Provide powerful mental tools, for diagnosing problems . Understanding models enables a tech to determine quickly at what layer a problem can occur.
- Provide a common language to describe networks.
OSI Layer 7 Represents what?
Application
OSI Layer 6 Represents what?
Presentation
OSI layer 5 Represents what?
Session
OSI Layer 4 Represents what?
Transport
OSI Layer 3 Represents what?
Network
OSI layer 2 Represents what?
Data Link
OSI Layer 1 Represents what?
Physical
Whats in the Physical layer of the OSI Model
Anything that moves data from one system to another, such as copper cabling, fiber optics, radio waves etc…
A NIC serves what function
Interface between the PC and the Network
NIC Provides what kind of Unique identifier
MAC Address (48-Bit value) (media access control address)
A in Hex represents What In decimal?
10
B in Hex represents What In decimal?
11
C in Hex represents What In decimal?
12
D in Hex represents What In decimal?
13
E in Hex represents What In decimal?
14
F in Hex represents What In decimal?
15
FF in Hex represents What In decimal?
255
An Oscilloscope is used to measure what?
Oscilloscope can measure voltage between network devices. Note: These voltages can assist in identifying the binary signals coming across the wire.
What is a Frame in Networking
Frame is a container for a chunk of data moving across a network.
NIC Creates and Sends, as well as receives and reads frames True or False?
True, The NIC is designed to create and send frames, as well as receive and read frames.
CRC
(Cyclic redundancy check) error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.
FCS
(Frame Check Sequence) Uses a type of binary math called CRC (cyclic redundancy check that the receiving NIC uses to verify that the data arrived intact. (Integrity)1
A NIC is composed of two logical parts what are they?
LLC and MAC