The mask length is 12 bits can be expressed as?

What is RouterDeadInterval of the OSPF protocol on the broadcast network by default? ()

As shown in the figure, there are three data packets captured by the administrator on the network. Which of the following statements is incorrect? (Single choice question) Source destination protocol info
10.0.12.110.0.12.2TCp50190>telnet#SYN#seq#0win#8192Len#0mss#146010.0.12.2 10.0.12.1 TCP telnet:
50190 #SYN,ACK#seg-0 Ack-1 win-8192 Len-0mss=1460
10.0.12.110.0.12.2 TCP50190>telnet(ACK)seq-1Ack=1win=81921en=0

Which packet type is used by network devices running the SNMPv1 protocol to actively send alarm information? ()

The output information of a router is shown in the figure. Which of the following statements are correct? ()