NO.216 The output information of the link aggregation port of a certain switch is as follows. If you want to delete Eth-Trunk1, which of the following commands is correct? ()

NO.217 The Tracert diagnostic tool records the () of each ICMP timeout message, so that it can provide the user with the IP address through which the message reaches the destination.

NO.218 UDP cannot guarantee the reliability of data transmission, and does not provide functions such as message sequencing and flow control. It is suitable for flows that do not require high transmission reliability, but require high transmission speed and delay ().

NO.219 After the network administrator uses the TracertRoute function on the router device, in the data packet sent by the router, the value of the Protocol field in the IPv4 header is?

NO.220 What is the total length of port ID in Spanning Tree Protocol? ()

NO.221 If the protocol used is telnet, then the value of the protocol field in the ipv4 header in the section is?

NO.222 The route entry 10.0.0.24/29 may be aggregated from which of the following subnet routes? ()*

NO.223 Users cannot configure VLAN ID. to 0. ()

NO.224 The role of the collaboration layer in the SDN architecture is to complete job deployment based on user intentions. OpenStack belongs to the business collaboration layer ()

NO.225 Which of the following descriptions about the router is wrong?

NO.226 The priority of the LACP protocol is shown in the figure. Switch A and Switch B adopt LACP mode link aggregation. And all interfaces join the link aggregation group. At the same time, set the maximum number of active ports to 3. Then which port of switch A is not the active port?

NO.227 What are the characteristics of VLAN based on ports?

NO.228 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?

NO.229 The bridge ID of the STP protocol in the switching network is as follows. Which of the following bridge ID switches will become the root bridge?

NO.230 Which of the following descriptions about firewalls is wrong? ()

NO.231 Which of the following advantages does the single-arm routing method achieve routing intercommunication between Vlan? ()

NO.232 At what layer of the OSI reference model does a router operate? ( )

NO.233 In the OSI reference model, what can complete end-to-end error detection and flow control is ()

NO.234 Which of the following descriptions about firewalls is wrong? ()

NO.235 From a security perspective, router A refuses to receive OSPF packets. ICMP packets received from the cO/0/1 interface. Which of the following commands can achieve this requirement? ()

NO.236 Which of the following descriptions about Trunk port and Access port are correct ()

NO.237 Which of the following parameters cannot be used for advanced access control lists? ()

NO.238 The configuration of the country code will affect the frequency used for actual transmission and the maximum transmission power. ()