Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree  Protocol IEEE 802.1D？ （）

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 .  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 . IP prefix B . Layer 2 circuit C . RSVP request from CE for bandwidth reservation D . BGP MED value

A . Designated Root Cost B . bridge ID priority C . max age D . bridge ID MAC address E . Designated Root Priority F . forward delay

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

A .  Designated Root Cost B .  bridge ID priority C .  max age D .  bridge ID MAC address E .  Designated Root Priority F .  forward delay

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 . audit VoWLAN cell edge coverage B . verify RFID tag coverage by four access points at -75 dBm C . audit microwave oven interference D . audit 802.11a channel 36 utilization E . create test scripts for 802.11n bonded channel throughput test

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 .  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 . Designated Root Cost B . bridge ID priority C . max age D . bridge ID MAC address E . Designated Root Priority F . forward delay

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 . source port B . output interface C . next-hop IP address D . source MAC address E . destination IP address F . next-hop MAC addre

A .  source port B .  output interface C .  next-hop IP address D .  source MAC address E .  destination IP address F .  next-hop MAC addre