Podcast Beta
Questions and Answers
CSMA/CD-l on võimalik saavutada flow control ilma ACK-de ja retransmissioonideta.
False
Manchester Encoding on meetod, mis kodeerib andmeid otse signaaliks.
False
CSMA/CD on juurdepääsu meetod, mis kasutab kanali reservatsiooni.
False
Raam on CSMA/CD-s andmeside ühendatud üksus.
Signup and view all the answers
CSMA/CD-s juhindutakse pöördumiste asemel ACK-de otstarbel.
Signup and view all the answers
Põrgepuhvimeetodis võib mitu seadet samaaegselt edastada andmeid.
Signup and view all the answers
Match the following communication concepts with their descriptions:
Signup and view all the answers
Match the following communication protocols with their characteristics:
Signup and view all the answers
Match the following communication terms with their functions:
Signup and view all the answers
Match the following communication protocols with their purposes:
Signup and view all the answers
Match the following communication concepts with their applications:
Signup and view all the answers
Study Notes
CSMA/CD
Flow Control
- CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection
- Flow control: a mechanism to prevent network congestion by regulating the amount of data sent by a device
- In CSMA/CD, flow control is achieved through the use of acknowledgments (ACKs) and retransmissions
- Sender waits for ACK before sending next packet
- If no ACK received, sender retransmits packet
Access Method
- CSMA/CD is a contention-based access method
- Multiple Access: multiple devices share the same channel
- Carrier Sense: devices sense the channel before transmitting to detect if it's busy
-
Collision Detection: devices detect collisions (when two devices transmit at the same time) and take corrective action
- When a collision is detected, devices stop transmitting and wait for a random period before retrying
Message Encoding
- Manchester Encoding is commonly used in CSMA/CD networks
-
Manchester Encoding: a method of encoding data bits into a signal
- Each data bit is represented by a transition in the signal (high-to-low or low-to-high)
- Provides a self-clocking signal, allowing the receiver to extract the original data bits
Message Encapsulation
- Frame: the basic unit of data transmission in CSMA/CD
-
Frame structure: typically consists of:
- Preamble: a sequence of bits used to synchronize the receiver
- Destination Address: the address of the intended recipient
- Source Address: the address of the sender
- Data: the actual data being transmitted
- CRC (Cyclic Redundancy Check): a error-checking mechanism
- Frame Check Sequence (FCS): a 4-byte field used to detect errors
- Frame length: typically limited to a maximum of 1518 bytes (IEEE 802.3 standard)
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of the CSMA/CD protocol, including flow control, access methods, message encoding, and message encapsulation. Learn about the basics of this protocol and how it's used in network communication.