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Computer Network Articles
Page 34 of 122
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 MoreDifferences between POP3 and IMAP
POP3 and IMAP are the most widely used standard protocols for email retrieval. Both protocols are supported by almost all current email clients and servers. Understanding their differences is crucial for choosing the right email setup for your needs. What is POP3? Post Office Protocol Version 3 (POP3) is an application layer protocol used by email clients to retrieve email messages from mail servers over TCP/IP networks. POP3 operates on a simple principle: download messages from the server to the local device, typically removing them from the server afterward. POP3 uses port 110 for standard connections and ...
Read MoreDifference Between Go-Back-N and Selective Repeat Protocol
Go-Back-N is a data link layer protocol that uses a sliding window method for reliable and sequential delivery of data frames. It has a sender window size of N and receiver window size of 1, meaning it can send N frames before requiring acknowledgment but processes frames sequentially at the receiver. Selective Repeat Protocol is also a data link layer protocol that uses sliding window method for reliable delivery of data frames. Here, only the erroneous or lost frames are retransmitted, while correctly received frames are buffered and processed out-of-order. Both protocols belong to the family of Automatic ...
Read MoreDifference between stateless and stateful protocols
A stateless protocol is one in which each communication is treated as a separate, independent event, with no memory of previous interactions. In contrast, a stateful protocol maintains information about the client's session and treats communications as part of an ongoing sequence. Understanding the difference between these two approaches is crucial for network design, as each has distinct advantages and use cases depending on the application requirements. Stateless vs Stateful Protocol Comparison Stateless Protocol Req1 ...
Read MoreDifference between LAN and WAN
A WAN (Wide Area Network) is a network of local area networks (LANs) that connects to other LANs via telephone lines, radio waves, and other communication technologies. WAN connections include both wired services like carrier Ethernet and commercial broadband Internet links, and wireless technologies such as cellular data networks (4G LTE), public Wi-Fi, and satellite networks. A LAN (Local Area Network) is privately owned and spans a smaller geographical area, typically restricted to a few kilometers. LANs are commonly used in offices, residences, hospitals, and schools, with straightforward setup and management requirements. What is a LAN? A ...
Read MoreDifference between LAN and MAN
Both LAN and MAN are computer networks that differ in terms of the geographical area they cover. LANs are private networks limited to a particular geographical area in the range of a few kilometers, while MANs cover a larger area that can span multiple cities and towns. Understanding the differences between these network types is crucial for choosing the right networking solution for your organization's needs. Local Area Network (LAN) A Local Area Network is a private network that connects computers and devices within a limited area like an office, a building, or a campus. LANs enable ...
Read MoreDifference between MAN and WAN
A Metropolitan Area Network (MAN) is a medium-sized network that covers a larger geographical area than a LAN, typically spanning cities or towns. In contrast, a Wide Area Network (WAN) is a much larger network that connects locations across countries or continents, essentially functioning as a network of LANs linked via various communication technologies. Understanding the differences between MAN and WAN is crucial for network design decisions, as each serves distinct purposes based on geographical coverage and connectivity requirements. MAN vs WAN Coverage Comparison ...
Read MoreDifference between Encryption and Decryption
The process of turning plain text into an encrypted form (cipher text) is known as encryption. Sensitive data is transmitted in an encrypted form so that it can be protected, and a strong encryption mechanism ensures that the data is not misused even if a hacker gets hold of it. Decryption is the reverse mechanism where the encrypted cipher text is converted back into its original form. Understanding the relationship between encryption and decryption is fundamental to modern cybersecurity and data protection. What is Encryption? Encryption is the procedure of encoding data in cryptography. This procedure turns ...
Read MoreDifference between Stop and Wait protocol and Sliding Window protocol
Stop and Wait protocol and Sliding Window protocol are two fundamental flow control mechanisms used in data communication networks. Both protocols ensure reliable data transmission but differ significantly in their approach and efficiency. The Stop and Wait protocol sends one frame at a time and waits for acknowledgment from the receiver before sending the next frame. In contrast, the Sliding Window protocol allows multiple frames to be sent simultaneously within a defined window size, making it more efficient for data transmission. What is Stop and Wait Protocol? The Stop and Wait protocol is the simplest flow control ...
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