How does CSMA CD and CSMA work?

CSMA/CA is effective before a collision. CSMA/CD is effective after a collision. CSMA/CA initially transmits the intent to send the data, once an acknowledgment is received, the sender sends the data. CSMA/CD resends the data frame in case a conflict occurs during transmission.

How does CSMA CD work in Ethernet?

Carrier-sense multiple access with collision detection (CSMA/CD) is a media access control (MAC) method used most notably in early Ethernet technology for local area networking. It uses carrier-sensing to defer transmissions until no other stations are transmitting.

What defines a BSS as opposed to an IBSS?

BSS stands for Basic Service Set . In this operating mode, one station (the BSS master , usually a piece of hardware called an access point ) acts as a gateway between the wireless and a wired (likely Ethernet) backbone. IBSS ( Independent Basic Service Set ) is frequently referred to as Ad-Hoc or Peer-to-Peer mode.

How collision is handled in CSMA CD?

The collision detection technology detects collisions by sensing transmissions from other stations. On detection of a collision, the station stops transmitting, sends a jam signal, and then waits for a random time interval before retransmission.

What are protocols and types of protocols?

Types of Protocols

• Transmission Control Protocol (TCP)
• Internet Protocol (IP)
• User Datagram Protocol (UDP)
• Post office Protocol (POP)
• Simple mail transport Protocol (SMTP)
• File Transfer Protocol (FTP)
• Hyper Text Transfer Protocol (HTTP)
• Hyper Text Transfer Protocol Secure (HTTPS)

What is the difference between an IBSS and a BSS?

Independent Basic Service Set (IBSS) allows two or more devices to communicate directly with each other without a need for a central device. Basic Service Set (BSS) Wireless LAN is established using a central device called an Access Point that centralizes access and control over a group of wireless devices.

What is CSMA/CD and how does it work?

The acronym CSMA/CD signifies carrier-sense multiple access with collision detection and describes how the Ethernet protocol regulates communication among nodes. While the term may seem intimidating, if we break it apart into its component concepts we will see that it describes rules very similar to those that people use in polite conversation.

Is the efficiency of CSMA/CD better than pure ALOHA?

The efficiency of CSMA/CD is better than Pure ALOHA however there are some points that need to be kept in mind while measuring the efficiency of CSMA/CD. If the distance increases, then the efficiency of CSMA/CD decreases.

What is the maximum length of the packets in CSMA?

The maximum limit for the length of the packets is 1500 bytes. Overhead is less in CSMA/CD. Whenever possible, it utilizes all the bandwidth. It detects collision within a very short span of time.

What is the collision domain in CSMA?

The collision domain is also located at this level. For CSMA/CD to work, error messages must reach all participants in the collision domain within a certain time: a data package runs from one end of the domain to the other, where a collision may occur.