Methods to eliminate congestion include suppression of grouping, back pressure, and load shedding . Congestion prevention measures include flow sensing and admission control.
Route selection is only performed when the virtual circuit is established during packet transmission
About the virtual circuit switching packet sequence: send in sequence , receive in sequence
Among the three switching structures of routers, the best performance is based on network switching
The switching structure completes the exchange of IP datagrams from the input port to the designated output port. Mainly include three switching structures based on memory switching, bus-based switching and network-based switching
A host can have multiple IP addresses
The upper two digits of the IP address are 10, indicating that the address belongs to a class B address
192.168.1.101 belongs to dotted decimal notation
The maximum number of hosts that can be identified by a class C IP address is 256
Routing Information Protocol RIP routing algorithm using a distance vector routing algorithm
The most effective and feasible solution to achieve large-scale network routing is hierarchical routing ,
Fill in the blank
The two important functions that the network layer needs to implement are forwarding and routing
The network that is routed according to the destination host address becomes the datagram network
The number of packet arrival subnetworks too much, resulting in network performance degradation phenomenon known as congestion
IPv6 increases the length of the IP address from 32 bits to 128 bits
The routing and forwarding process adopts the principle of longest prefix matching first
The maximum amount of data that a data link layer protocol frame can carry is called the maximum transmission unit of the link
Among the three marking methods of IP addresses, the most commonly used is dotted decimal notation.
Short answer
What are the reasons for congestion? There are four main reasons for congestion:
The buffer capacity is limited.
The bandwidth of the transmission line is limited.
The processing power of network nodes is limited
Some parts of the network are malfunctioning
Briefly describe the main difference between virtual circuit switching and data exchange. The main difference between virtual circuit switching and datagram exchange is as follows: whether the functions such as sequence control, error control and flow control are completed by the network, or the end system completes the virtual circuit network The network usually completes these functions to provide error-free data transmission services to the end system, and the end system can be very simple; the datagram network usually implements simple functions, such as basic routing and forwarding, sequence control, error control and flow Control and other functions are completed by the end system.