Which two of these multicast deployments are most susceptible to attacks from unknown sources?（）

A .  class of service B .  bandwidth profiles C .  user-network interface D .  Ethernet LAN circuit attributes E .  Ethernet virtual circuit attribute

A .  An ACL can be applied to multiple interlaces. B .  An ACL wildcard mask is identical to an IP subnet mask. C .  There may be multiple ACLs per protocol， per direction， and per interface. D .  There is an "implicit deny" at the end of an ACL and will result in a dropped packet. E .  An ACL acts on all packets， those flowing thru the router and those originated by the router itself. F .  An ACL will be processed from top to bottom and may have multiple matches that will act on the packet that is being tested.

A . it is a layer 2 messaging protocol which maintains vlan configurations across network. B . it includes an 8-bit field which specifies the priority of a frame. C . it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes. D . it modifies the 802.3 frame header,and thus requires that the FCS be recomputed. E . it is a trunking protocol capable of carring untagged frames.

A . use ISL encapsulation B . use 802.1q encapsulation C . set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation D . use VTP server mode to support dynamic propagation of VLAN information across the network E . set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation.

A .  SSID broadcast prevention B .  Improved mutual authentication C .  Improved encryption through AES D .  Improved protection against sniffing initialization vectors E .  RF jamming preventio

A .  Layer 3 MPLS VPNs can forward only IP packets B .  Layer 2 MPLS VPNs can forward any network protocol C .  MPL S label paths are automatically formed based on Layer 2 frames D .  Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 frames E .  In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policie

A . There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast. B . A single interface may be assigned multiple IPv6 addresses of any type. C . Every IPv6 interface contains at least one loopback address. D . The first 64 bits represent the dynamically created interface ID. E . Leading zeros in an IPv6 16 bit hexadecimal field are mandatory.

A . supports multiple protocols B . works only in a shared or loop environment C . allows addressing for up to 4 million nodes D . allows addressing for up to 8 million nodes E . provides a high speed transport for SCSI payloads F . may stretch to a distance of up to100 km before needing extender

A . passively listens to network traffic B . is an active device in the traffic path C . has a permissive interface that is used to monitor networks D . traffic arrives on one IDS interface and exits on another E . has a promiscuous interface that is used to monitor the network

A . RSTP cannot operate with PVST+. B . RSTP defines new port roles. C . RSTP defines no new port states. D . RSTP is a proprietary implementation of IEEE 802.1D STP. E . RSTP is compatible with the original IEEE 802.1D STP.

A .  use ISL encapsulation B .  use 802.1q encapsulation C .  set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation D .  use VTP server mode to support dynamic propagation of VLAN information across the network  E .  set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation.

A . use ISL encapsulation B . use 802.1q encapsulation C . set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation D . use VTP server mode to support dynamic propagation of VLAN information across the network E . set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiatio

A . only operational in routed mode B . only operational in transparent mode C . only eight interfaces can belong to an asymmetric routing group D . operational in both failover and non-failover configurations E . only operational when the firewall has been configured for failover

A .  AirDefense for wireless IDS is required by autonomous APs. B .  2.40Hz CK management can monitor both 802.11 and non-802.11 CK interference. C .  APs only monitor the RF channels that are servicing the clients. D .  Cisco or CCX compatible client cards can extend the CK IDS service for autonomous APs. E .  Autonomous APs must be dedicated IDS sensors while lightweight APs can combine client traffic and RF monitoring.

A . class of service B . bandwidth profiles C . user-network interface D . Ethernet LAN circuit attributes E . Ethernet virtual circuit attribute

A .  supports multiple protocols B .  works only in a shared or loop environment C .  allows addressing for up to 4 million nodes D .  allows addressing for up to 8 million nodes E .  provides a high speed transport for SCSI payloads F .  may stretch to a distance of up to 100 km before needing extender

A . passively listens to network traffic B . is an active device in the traffic path C . has a permissive interface that is used to monitor networks D . traffic arrives on one IPS interface and exits on another

A .  multicast routing uses RPF B .  multicast routing is connectionless. C .  In multicast routing， the source of a packet is known. D .  When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath E .  Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destinatio

A .  Each router determines where to send the JOIN request. B .  The tree will be built based on the IP address of the E2 interface on router E C .  The best path to the source will be discovered in the unicast routing table on router B D .  The best path to the source will be discovered in the unicast routing table on router C E .  The best path to the source will be discovered in the unicast routing table on router E

A .  available only in autonomous APs B .  available in autonomous and lightweight APs C .  a feature of WDS in autonomous APs D .  a feature of WDS in lightweight APs E .  requires at least one AP and one Wireless LAN Services Module

A . RSTP cannot operate with PVST+. B . RSTP defines new port roles. C . RSTP defines no new port states. D . RSTP is a proprietary implementation of IEEE 802.1D STP. E . RSTP is compatible with the original IEEE 802.1D STP.

A .  An 802.11 g access point with a variety of antennas can be used in all standard site surveys. B .  Site surveys can be performed manually or through assisted site survey. C .  Channel power during testing starts at the default minimum and gradually increases to the maximum. D .  Overlapping access points can create performance problems. E .  Surveys should be done after hours in an office building or during reduced inventory levels in warehouses.

A .  passively listens to network traffic B .  is an active device in the traffic path C .  has a permissive interface that is used to monitor networks D .  traffic arrives on one IPS interface and exits on another

A .  only operational in routed mode B .  only operational in transparent mode C .  only eight interfaces can belong to an asymmetric routing group D .  operational in both failover and non-failover configurations E .  only operational when the firewall has been configured for failover

A . it is a layer 2 messaging protocol which maintains vlan configurations across network. B . it includes an 8-bit field which specifies the priority of a frame. C . it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes. D . it modifies the 802.3 frame header，and thus requires that the FCS be recomputed. E . it is a trunking protocol capable of carring untagged frames.