请解释: UDP, FDM, ABR,EFCI,AIMD,MSS
时间: 2023-10-10 11:13:55 浏览: 49
1. UDP (User Datagram Protocol):一种无连接的传输协议,它将数据分成数据报发送,不保证数据的可靠性和顺序。UDP常用于实时应用程序,如视频或音频流,因为它的快速传输速度和较低的延迟。
2. FDM (Frequency Division Multiplexing):一种多路复用技术,用于将多个信号传输到同一信道上。它将频率范围分成多个子频率范围,每个子频率范围分配给一个不同的信号,从而实现多个信号传输到同一信道上。
3. ABR (Available Bit Rate):一种流量控制机制,用于在网络拥塞时控制数据传输速率。当网络拥塞时,ABR会减少数据传输速率,以减轻网络负载,并避免数据包的丢失。
4. EFCI (Explicit Forward Congestion Indication):一种拥塞控制机制,用于在网络拥塞时通知发送方减少发送速率。当网络拥塞时,EFCI会在数据包首部中设置标志位,告诉发送方减少发送速率。
5. AIMD (Additive Increase Multiplicative Decrease):一种拥塞控制算法,用于在网络拥塞时调整数据传输速率。当网络拥塞时,AIMD会逐渐增加数据传输速率,直到网络拥塞,然后将速率减少一半,以避免网络拥塞。
6. MSS (Maximum Segment Size):一种TCP协议参数,用于指定TCP数据包中允许的最大数据量。它通常由网络设备或操作系统配置,在TCP连接建立时协商确定。
相关问题
Explain precisely following abbreviations: UDP, FDM, ABR,EFCI,AIMD,MSS
UDP: User Datagram Protocol - A communication protocol that allows for the transmission of data over the internet. Unlike TCP, it does not guarantee the delivery of data and does not establish a connection between the sender and receiver.
FDM: Frequency Division Multiplexing - A method of transmitting multiple signals over a single communication channel by dividing the channel into multiple frequency bands, each of which is used to transmit a separate signal.
ABR: Available Bit Rate - A type of service in ATM (Asynchronous Transfer Mode) networks that allows for the dynamic allocation of bandwidth based on network congestion. ABR service aims to minimize delay and maximize network efficiency.
EFCI: Explicit Forward Congestion Indication - A mechanism used in ATM networks to signal congestion to network users. When network congestion occurs, the network sends EFCI signals to inform users to reduce their transmission rates.
AIMD: Additive Increase Multiplicative Decrease - A congestion control algorithm used in TCP (Transmission Control Protocol) networks to regulate network traffic. It increases the transmission rate until congestion occurs and then decreases the rate exponentially to avoid network congestion.
MSS: Maximum Segment Size - The largest amount of data that can be transmitted in a single TCP segment. It is determined by the maximum transmission unit (MTU) of the network, which is the largest size of data that can be transmitted over the network without fragmentation.
DESTDIR = D:\Code\fdm\Bin
你好!关于你提到的代码段,它是一个在.pro文件中设置目标目录的语法。"DESTDIR =" 表示设置输出目录的路径。
在这个例子中,`D:\Code\fdm\Bin` 是一个指定的输出目录路径。
这个代码段的作用是将生成的二进制文件输出到 `D:\Code\fdm\Bin` 目录中。
请注意,这个路径是一个绝对路径,指定了程序生成的二进制文件将被放置的目录。这样可以方便地将生成的文件集中存放在指定的位置。
如果你还有其他问题,请随时提问。我会尽力帮助你解答。