Which two steps does a receiver perform to validate a message using HMAC？ （）  

A . The peer router immediately removes the BGP routers that it learned from the restarting router from itsBGP routing tables. B . The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router waits to receive updates from the neighboringrouters. When the neighboring routers send end-of-RIB messages to indicate that they are donesending updates，the restarting router starts sending its own updates. C . The peer router sends an end-of-RIB message to the restarting router. D . The restarting router removes any stale prefixes after the timer for stale entries expires. E . The restarting router does not remove any stale prefixes after the timer for stale entries expires.

A .  Enable feature vPC B .  Define domains C .  Establish peer keepalive connectivity D .  Create a peer link E .  Configure the peer link as a trunk port F .  Create port channels and vPCs G .  Define port channel load-balancing method H .  Make sure configurations are consistent

A . Use the command PURGE BINARY LOGS and specify a binary log file name or a date and time to remove unused files B . Execute the PURGE BINARY LOGE NOT USED command C . Remove all of the binary log files that have a modification date earlier than today D . Edit the .index file to remove the files you want to delete E . Ensure that none of the attached slaves are using any of the binary logs you want to delete

A . bandwidth efficiency B . cell-switching C . congestion notification D . heterogeneous network

A . wireless connectivity B . call routing configuration C . device discovery D . call forwarding E . command line configuratio

A . Host 1 addresses the frames to the MAC address of router R1 B . Host 1 looks in its ARP cache for the MAC address of router R1 C . Host 1 addresses the frames to the MAC address of web server 2 D . Host 1 sends the packets to router R1 to be forwarded to web server 2 E . Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2

A .  device Discovery B .  call forwarding C .  call routing configuration D .  command line configuration E .  wireless connectivity

A . NOT NULL B . PRIMARY KEY C . FOREIGN KEY D . CHECK E . UNIQUE

A .  bandwidth efficiency B .  cell-switching C .  congestion notification D .  heterogeneous network

A . The compute node reboots and is then connected to the CMC B . A compute node is assigned to a service profile C . if the association is successful the cisco UCS manager boots the cisco UUOS to configure the compute node D . The compute node reboots to reload and then loads NX OS and establishes connections to both the CMC and the IOM

A . STP root status B . VTP mode C . Negotiation status D . Management domain E . Configuration revision number

A . Authentication and Authorization credentials B . Microsoft Active Directory credentials C . LDAP assignment D . Role assignment

A . RSSI of the client at the access point B . WMM state C . current MOS value D . current RF channel E . current transmit data rate

A . a working cycle B . the operation C . two fuel injections D . event

A . Cisco IOS upgrade, including the most recent patches and bug fixes B . OnSite Support C . Advanced Hardware Replacement D . No Hardware Replacement

A . Busy   B . Invalid   C . Successful   D . Unsuccessfu

A . DB Get   B . DB Read   C . DB Write   D . DB Release

A . Always stop the server prior to the backup B . Stop the server or lock the tables prior to the backup C . Stop the server or lock the databases prior to the backup D . Make a copy of the .frm, .myd, and the .myi files E . Make a copy of the binary log and tablespace file

A . There may be a bottleneck in the application that additional hardware would not solve. B . Adding more hardware is costly and time consuming. C . Adding hardware at the application layer may place additional load on an already overloaded database, network appliance, or storage system. D . Adding more hardware may introduce new configuration requirements that need to be tested.

A .

A . The peer router sends an end-of RIB message to the restarting router B . The peer router immediately removes the BGP routes that it learned from the restarting router from its BGP routing table C . The restarting router does not remove any stale prefixes after the timer for stale entries expires D . The router establishes BGP sessions with other routers and relearns the BGP routes from other routers that are also capable of graceful restart. The restarting router waits to receive updates from the neighboring routers. When the neighboring routers send end-of-RIB messages to indicate that they are done sending updates， the restarting router starts sending its own updates E . The restarting router removes any stale prefixes after the timer for stale entries expire

A . The customer uses SNMP statistics to create the policy. B . QoS policy templates are generated and installed on the interface. C . RTP is used to generate the policy. D . LLQ，cRTP，and LFI are used to automatically discover the policy. E . The auto-generated policy is manually optimized before implementation. F . Auto-discovery is used to determine what traffic is on the interface.

A . Open a Web browser and log on to the IMM; in the navigation frame, click IMM Firmware Update under IMM Control; click Browse; select the .exe file; click the Upgrade/Update button  B . TFTP to the AMM; from the Main Menu, select Update; browse to the downloaded .exe file  C . Telnet to AMM; from the Main Menu, select Update; browse to the downloaded .pkt file  D . Open a Web browser and log on to the AMM; in the navigation frame, click AMM Firmware Update under AMM Control; click Browse; select the .pkt file; click the Upgrade/Update butto

<img src='https://img2.soutiyun.com/ask/uploadfile/2127001-2130000/4fc3fa773ba3ff1b4a790c7f86a536e7.jpg' /> A． B． C． 此题为多项选择题。