The last option field (option) of IPv4 is variable-length optional information. The maximum length of this field is?
The network shown in the figure below. The router receives a data packet with a destination IP address of 11.0.12.1 from host A.
After this data is forwarded by the router, what are the destination MAC and destination IP? )(Single-choice question)
The origin of SDN is the separation of transfer and control. The separation of transfer and control is a way to realize SDN, not the essence.
The IPv4 address assigned by the network administrator to a host in the network is 192.168.128, how many more hosts can be added to the network where this host is located? ()
In the network shown in the figure below, the host logs in to router A through Telnet, and then obtains the configuration file of router B through FTP on the remote interface. How many TCP connections exist on router A at this time?
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