Networking

Draw a sketch of a packet. Label the three sections of a packet?

Each packet consists of three distinct parts, each of which each part contains some of the components listed above: Header: typically includes an alert signal to indicate that the data is being transmitted, source and destination addresses and clock information to synchronise the transmission.

What happens to the packets if two packets of data collide during transmission?

In a network, when two or more stations attempt to transmit a packet across the network at the same time, a packet collision occurs. ... When a packet collision occurs, the packets are either discarded or sent back to their originating stations and then retransmitted in a timed sequence to avoid further collision.

What is a broadcast (with respect to networks)?

In computer networking, broadcasting refers to transmitting a packet that will be received by every device on the network. In practice, the scope of the broadcast is limited to a broadcast domain.

How does Token Passing work?

In the access method known as token passing, a special type of packet, called a token, circulates around a cable ring from computer to computer. When any computer on the ring needs to send data across the network, it must wait for a free token.

What access method do Wireless networks use?

What type of access method is used in wireless networks? Like CSMA/CD, Carrier Sensing Media Access/Collision Avoidance (CSMA/CA) is a method used by Ethernet to access a local area network. Where CSMA/CD is most commonly used for wired networks, CSMA/CA is most commonly used for wireless networks.

How many tokens can circulate a network at one time?

5

What is the IEEE standard that pertains to Ethernet (give the number)?

802

What is the IEEE standard that pertains to Token Passing (give the number)?

802.4

List the four different Media Access Methods that we studied?

CSMA/CD (used in Ethernet and IEEE 802.3) Token bus (IEEE 802.4) Token ring (IEEE 802.5) Token passing (used in FDDI)

How does CSMA/CD work?

CSMA/CD works by detecting a collision in the medium and backing off (after transmitting a jam signal) as necessary. Assume, we have a LAN with a number of hosts. ... If it detects a collision, it transmits a special jam signal so that all other receivers can know there was a collision.

What does CSMA/CD stand for? What does CSMA/CA stand for?

Carrier-sense multiple access with collision detection/ Carrier-sense multiple access with collision avoidance

What two types of media (cabling) are now commonly used with Ethernet networks?

Copper cable—Types of cable include unshielded twisted-pair (UTP), shielded twisted-pair (STP), and coaxial cable. ... Wireless—Wireless media include radio frequencies, microwave, satellite, and infrared

What is the purpose of the CRC routine which is located in the trailer of a packet?

Cyclic redundancy check. A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.

With which type of access method does a computer signal its intent to transmit before transmitting?

The method used by Local Talk is called CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance). It is similar to CSMA/CD except that a computer signals its intent to transmit before it actually does so.Sep 26, 2011

What type of media (cabling) was traditionally used with Ethernet network?

UTP

How does Switching work?

While switches allow different devices on a network to communicate, routers allow different networks to communicate. A router is a networking device that routes data packets between computer networks. A router can connect networked computers to the Internet, so multiple users can share a connection.

Which part of a computer determines whether a packet is addressed to that computer?

mac address

How often do collisions occur in Token Ring networks?

not very often

In what form is data sent across networks? (Hint: NOT in continuous streams)

packets