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Articles by Moumita
Page 2 of 12
DCF InterFrame Spacing (DIFS)
Distributed coordination function (DCF) is a mandatory technique used to prevent collisions in IEEE 802.11-based WLAN standard (Wi-Fi). It is a medium access control (MAC) sublayer technique used in areas where carrier-sense multiple access with collision avoidance (CSMA/CA) is used. Using DCF technique, a station needs to sense the status of the wireless channel before it can place its request to transmit a frame. The time interval that a station should wait before it sends its request frame is known as DCF Interframe Spacing (DIFS). What is DIFS? DIFS is a specific time duration that wireless stations ...
Read MoreShort InterFrame Spacing (DIFS)
Short Interframe Spacing (SIFS) is the time interval required by a wireless device between receiving a frame and responding to the frame. It is used in the Distributed Coordination Function (DCF) scheme, which is a mandatory collision avoidance technique in IEEE 802.11-based WLAN standards (Wi-Fi). The duration of SIFS equals the sum of delays in Radio Frequency (RF), Physical Layer Convergence Procedure (PLCP), and MAC (Medium Access Control) layer processing. This timing ensures that high-priority control frames like ACK and CTS get immediate channel access without competing with data frames. In IEEE 802.11 networks, SIFS is the shortest ...
Read MoreWhat is Thin Ethernet?
Thin Ethernet, popularly known as cheapernet or thinnet, is among the family of Ethernet standards that uses thinner coaxial cable as a transmission media. It is technically known as 10BASE-2. Here, 10 is the maximum throughput (10 Mbps), BASE denotes use of baseband transmission, and 2 refers to the maximum segment length of about 200 metres (precisely 185 metres). This type of cabling allows a maximum of 30 stations to be connected to it by BNC connectors with 50 centimetres minimum gap between subsequent stations. 10BASE-2 Thin Ethernet Network Topology ...
Read MoreThick Ethernet vs thin Ethernet
Thick Ethernet and Thin Ethernet are two early forms of coaxial cable-based Ethernet networking that were widely used in the 1980s and early 1990s. Both technologies use CSMA/CD (Carrier Sense Multiple Access with Collision Detection) for media access control and operate in a bus topology. Thick Ethernet (10BASE5) Thick Ethernet was the first commercially available form of cabling supported by Ethernet. It is technically known as 10BASE5, where 10 represents the maximum throughput of 10 Mbps, BASE denotes the use of baseband transmission, and 5 refers to the maximum segment length of 500 meters (1, 600 ft). ...
Read MoreFrame bursting in Computer Network
Frame bursting is a transmission technique used at the data link layer of the OSI model to increase the rate of transmission of data frames. It can be effectively deployed in Gigabit Ethernet networks to increase network throughput and is specified in the IEEE 802.11e QoS specification. By this technique, a sender can transmit a series of frames in succession without surrendering control of the transmission medium. A set of smaller frames may be concatenated to form a large frame that is transmitted at one go, reducing overhead and improving efficiency. How Frame Bursting Works Standard Transmission ...
Read MoreGigabit Ethernet Cabling
Gigabit Ethernet can be deployed using both copper wires and fiber optic cables. Since they target data rates of 1 gigabit per second (1 Gbps), they require encoding and decoding a bit within a nanosecond. This was first achieved in the 1000BASE-CX version. Gigabit Ethernet Cabling Types 1000BASE-T UTP Copper 100m max 1000BASE-CX STP Copper 25m max 1000BASE-SX Multimode Fiber 550m max 1000BASE-LX ...
Read MoreThe original fast Ethernet cabling
Fast Ethernet cabling refers to the physical transmission media used to carry data traffic at 100 Mbps (Megabits per second) in local area networks. Fast Ethernet utilizes both copper wires and fiber optic cables, depending on the specific implementation and distance requirements. The cabling infrastructure must be capable of handling 100 Mbps data transmission rates. Earlier copper wire standards were inadequate due to their inability to reliably transmit 100 Mbps data over the standard 100-meter segment length required for Ethernet networks. Fast Ethernet Cabling Types 100BASE-T4 ...
Read MoreJumbo Frames in Computer Network
In computer networks, jumbo frames are Ethernet frames with a payload size greater than the standard 1500 bytes Maximum Transmission Unit (MTU) defined by the IEEE 802.3 standard. These larger frames can carry up to 9000 bytes of data, significantly increasing the amount of information transmitted in a single frame. Jumbo frames are primarily used in high-performance network environments where maximizing data throughput and reducing processing overhead are critical requirements. Standard Frame vs Jumbo Frame Comparison Standard Ethernet Frame MTU: 1500 bytes ...
Read MoreDirected Acyclic Graph (DAG)
In computer science and mathematics, a Directed Acyclic Graph (DAG) refers to a directed graph which has no directed cycles. This fundamental data structure plays a crucial role in various computational applications where hierarchical relationships and dependencies must be maintained without circular references. How It Works In graph theory, a graph refers to a set of vertices which are connected by lines called edges. In a directed graph or digraph, each edge is associated with a direction from a start vertex to an end vertex. If we traverse along the direction of the edges and we find that ...
Read More10-Gigabit Ethernet
In computer networks, 10-Gigabit Ethernet is the family of Ethernet technologies that achieve maximum rates up to 10 gigabits per second (10 Gbps). It is also known as 10GE, 10GbE, or 10 GigE. It is defined by the IEEE 802.3ae-2002 standard. 10GE is ten times faster than Gigabit Ethernet and supports only full-duplex communication. Multimode fiber having 850 nm wavelength is used for medium distances, while single-mode fiber having 1310 nm or 1550 nm wavelengths is used for long distances. 10-Gigabit Ethernet Physical Media Types Copper ...
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