Which security mechanism uses the concept of a realm？（）

A . represent B . represents C . representing D . being represented

A .  authorization B .  data integrity C .  confidentiality D .  authenticatio

A . class-based policing is configured using the Modular QoS command-line （MQC） B . only the Frame Relay traffic-shaping （FRTS） mechanism can interact with a Frame Relay network， adapting to indications of Layer2 congestion in the WAN links C . Distributed Traffic Shaping （DTS） is configured with the police command under the policy map configuration D . both Frame Relay traffic shaping （FRTS） and virtual IP （VIP）-based Distributed Traffic Shaping （DTS） have the ability to mark traffic

A .  authorization B .  data integrity C .  confidentiality D .  authenticatio

A .  EAP-TLS authentication B .  MS-CHAP v2 authentication C .  a stand-alone certification server D .  an enterprise certification server E .  MPPE 56-bit encryptio

A . An alternator B . An electric motor C . A diesel engine D . A main switchboard

A . Authorization B . Data integrity C . Confidentiality D . Authenticatio

A . Direct linkage between the ball-head and fuel rack B . A servomotor C . A compensating device D . Flyweight

A .  HTTP Basic Authentication B .  Form Based Authentication C .  HTTP Digest Authentication D .  HTTPS Client Authenticatio

A . Single whip B . Gun tackle C . Luff tackle D . Twofold purchase

A . Each subinterface has its own hardware queue and can experience congestion just like its main interface B . Hardware queuing is only used if the software queues are experiencing congestion. C . Hardware queues and software queues are not used concurrently. D . The hardware queuing system always uses the FIFO queuing mechanism.

A . secure tunnels B . a separate management VLAN C . secure VLANs to isolate sensors D . an out-of-band path around the firewall E . asymmetric traffic flows to isolate sensors F . private VLANs to put all sensors on isolated port

A . the two methods of authentication using the WEP encryption are open and shared key B . the 802.11 standard defines WEP security using 128-bit keys C . WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST D . WEP is a scalable encryption solution that uses static keys for authentication E . WEP security provides only one-way authentication F . WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism

A . HTTP Basic Authentication B . Form Based Authentication C . HTTP Digest Authentication D . HTTPS Client Authenticatio

A . Frame Relay B . HDLC C . x.25 D . PPP

A . Dead Peer Detection （DPD） B . CDP C . isakmp keepalives D . GRE keepalive mechanism E . The hello mechanism of the routing protocol across the IPsec tunnel

A . FIFO queuing is only appropriate for slower serial interfaces B . weighted fair queuing is the default queuing mechanism used for all but slower than E1 rate interfaces C . only one queuing mechanism type can be applied to an interface D . weighted fair queuing does not require the configuration of access lists to classify traffic   E . flow-based weighted fair queuing provides for queues to be serviced in a round-robin fashio

A . ISATAP B . NATV6 C . manually configured overlay tunnels D . dual stack configuratio

A . EAP-TLS authentication B . MS-CHAP v2 authentication C . a stand-alone certification server D . an enterprise certification server E . MPPE 56-bit encryptio

A . TACACS B . Telnet C . SMTP D . SNMP E . HTTP F . TFTP

A .  authorization B .  data integrity C .  confidentiality D .  authenticatio

A . operated manually once an hour B . operated until the engine has started C . placed into operation only at maximum load D . adjustable to meet lubrication requirement

A .  secure tunnels B .  a separate management VLAN C .  secure VLANs to isolate sensors D .  an out-of-band path around the firewall E .  asymmetric traffic flows to isolate sensors F .  private VLANs to put all sensors on isolated port

A . Objects are deleted when they can no longer be accessed through any reference. B . The finalize（） method will eventually be called on every object. C . The finalize（） method will never be called more than once on an object. D . An object will not be garbage collected as long as it is possible for an active part of the program to  access it through a reference. E . The garbage collector will use a mark and sweep algorithm.