Each layer of the OSI model interacts with the layer directly above and below it, encapsulating and transmitting data in a structured manner. This approach helps network professionals troubleshoot issues, as problems can be isolated to a specific layer. The OSI model serves as a universal language...
being wound up together in the Internet Protocol Suite as the “Application” layer. In the OSI model, the session layer sets up, controls, and tears down the connections between two or more computers, which maps roughly to authentication processes. ...
The application layer is the layer of the OSI model that is closest to the end user, which means both the OSI application layer and the user interact directly with a software application that implements a component of communication between the client and server, such as File Explorer and Micros...
1、物理层（Physical Layer）：主要功能为定义网络的物理结构，传输的电磁标准，Bit流的编码及网络的时间原则，如分时复用及分频复用。决定了网络连接类型（端到端或多端连接）及物理拓扑结构。说得通俗一些，这一层主要负责实际的信号传输。物理层的主要设备：中继器、集线器。2、数据链路层（Data Link R...
Routing packets through a network is also defined at this layer plus a method to fragment large packets into smaller ones depending on MTUs for different media (Packet Switching). Once the data from layer 2 has been received, layer 3 examines the destination address and if it is the address...
Layer 2: Data Link Layer The Data Link Layer sits just above the Physical Layer and plays a pivotal role in network communication. Its primary responsibilities include framing data for transmission and managing MAC addresses for efficient and reliable data exchange. Framing: One of the key fun...
Layer 2 Switch vs Layer 3 Switch How to Fix HDMI Port Connection (TV, Windows) History of TCP/IP Here are some important landmarks from the history of TCP/IP: In 1974, Vint Cerf and Bob Kahn published a paper “A Protocol for Packet Network Interconnection” which describes the TCP...
A product from one network equipment vendor that implements OSI Layer 2 functionality, for example, will be much more likely to interoperate with another vendor's OSI Layer 3 product because both vendors are following the same model. The OSI model also makes network designs more extensible because...
In the seven-layer OSI model of computer networking, the network layer is layer 3. The network layer is responsible for packet forwarding including routing through intermediate routers, since it knows the address of neighboring network nodes, and it also manages quality of service (QoS), and rec...
【CCNA】4.OSI Layer3 网络层,Mac编址存在的问题在之前的博客中提到,2层数据链路层中,我们是通过mac地址来进行编址的。而这中方式会有如下三个问题:1.所有的设备处在同一个广域网中(这样信息就不安全)2.设备定位查找麻烦3.难以对设备进行区分...