The IP protocol corresponds to layer ______ of the OSI reference model.
There are two hops from the source device to the destination device. Use the tracert command to detect the path. When the first hop is detected, the source device sends a UDP packet with a TTL of 1 to a larger port of the destination device. When the packet reaches the middle hop, the TTL will change to 0, so the device responds to the source device. Respond to an ICMP______ message.
In the switching network shown in the figure, all switches have enabled the STP protocol.
SWA was selected as the root bridge. According to the information in the figure, the _______ port should be set to the Blocking state. (Multiple choice)
WLAN (Wireless LAN) is a combination of computer network and wireless communication technology. Which of the following are WLAN technical standards? (multiple choice)
A Layer 3 switch is connected to the GE0/0 interface of the customer's router MSR-1, and this Layer 3 switch is the default gateway for multiple network segments of the customer's office network to which it is connected. MSR-1 is connected to the Internet through the serial port S1/0. The entire network has been interoperable normally, and office network users can access the Internet. Add the following ACL configuration on the router:
firewall enable
acl number 3004
rule 0 deny ip source 192.168.1.0 0.0.0.255
rule 5 permit tcp source 192.168.0.0 0.0.255.255
rule 10 permit icmp
At the same time, ACL 3004 is applied in the inbound direction of GE0/0, then ______. (Multiple choice)
