In the display of the display interface command, which of the following LCP and NCP status indicates that the PPP link has been established?

• A.LCP Closed, IPCP Closed
• B.LCP Closed, IPCP Opened
• C.LCP Opened, IPCP Opened
• D.LCP Initial, IPCP Closed

Comment: *

Name: *

Email: *

Verification: *

Ping is actually an application developed based on the ______ protocol.

• A.ICMP
• B.UDP
• C.IP
• D.TCP

Comment: *

Name: *

Email: *

Verification: *

Which of the following descriptions about the access ports and links of S series Ethernet switches is correct is ______. (Multiple choice)

• A.The access port can belong to multiple VLANs at the same time
• B.The access link can only carry data frames without VLAN ID
• C.The access link can only carry data frames with VLAN ID
• D.When the access port receives a data frame without a VLAN ID, the PVID value of the port is added as the VLAN ID of the data frame

Comment: *

Name: *

Email: *

Verification: *

The number of available host addresses contained in the natural classification network segment corresponding to the IP address 165.110.20.67 is. (Please fill in Arabic numerals)

Comment: *

Name: *

Email: *

Verification: *

The correct statement about STP, RSTP and MSTP is ______. (Multiple choice)

• A.STP cannot converge quickly. When the network topology changes, the originally blocked port will need to wait for a period of time before it becomes the forwarding state.
• B.MSTP can make up for the shortcomings of STP and RSTP. It can not only converge quickly, but also enable the traffic of different VLANs to be forwarded along their respective paths, thereby providing a better load sharing mechanism for redundant links.
• C.MSTP is compatible with STP and RSTP.
• D.RSTP is an optimized version of the STP protocol. The delay for the port to enter the forwarding state is greatly shortened under certain conditions, which shortens the time required for the network to finally reach topological stability.

Comment: *

Name: *

Email: *

Verification: *