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Applications that do not need reliable data stream service can use User Datagram Protocol (UDP), which provides connectionless datagram services that prioritize time over reliability. TCP uses a method to avoid network congestion. However, TCP has some vulnerabilities, including denial of service, conn...
Transport layer protocols:Establish communication through connection-oriented sessions and connectionless broadcasts. Protocols at this layer includeTransmission Control Protocol (TCP)andUser Datagram Protocol (UDP). Internet layer protocols:Responsible for routing andencapsulationinto IP packets. Protocols at th...
TCP/IP中有两个具有代表性的传输层协议 TCP是面向连接;TCP连接只能是点到点、一对一的;通过TCP连接传送的数据,无差错,不丢失,不重复,且按序到达;TCP传输效率相对较低。 UDP是无连接的;UDP支持一对一,一对多,多对一和多对多的交互通信;UDP尽最大努力交付,即不保证可靠交付;UDP传输效率高。 TCP为什么是三次...
Transport layer.The transport layer is responsible for maintaining end-to-end communications across the network. TCP handles communications between hosts and provides flow control, multiplexing and reliability. The transport protocols include TCP and User Datagram Protocol (UDP), which is sometimes used ...
NoteThe Computer Browser service relies on media access control (MAC)-level broadcast packets sent using NetBT to and from UDP port 138 (the NetBIOS datagram port). In contrast, B-node NetBIOS name registration and name query requests are sent as MAC-level broadcasts over UDP port 137 (th...
proxy udp -p ":5353" -T udp -P "8.8.8.8:53" 那么访问本地UDP:5353端口就是访问8.8.8.8的UDP:53端口。 -p参数支持的写法: -p ":8081" 监听8081 -p ":8081,:8082" 监听8081和8082 -p ":8081,:8082,:9000-9999" 监听8081和8082以及9000,9001至9999,共1002个端口 如果本地监听端口数量大于1...
TCP、UDP等主要协议的特点,主要格式,以及重要字段在协议交互中起到的作用。 2)对于简单的TCP/IP协议导致的问题,有基本的判断 熟悉网络问题的解决方法,一个问题,应该是由上而下(top-button),还是由下而上(button-top)来分析? 3)基本的编程知识。 在系统内,构建简单通信。 在系统间,构建简单的通信。 熟悉系统...
UDP socket,inp_ppcbis a pointer to audpcbstructure, but here it is casted totcpcbstructure due to the lack of validation. When the code further accesses thetcp_timerstructure variablet_timersat offset 0x20, the access is out of bounds because theudpcbstructure is only 0x...