A.a class can be inentified as a single application .multiple applications with similar service nees.or be based on the source or destination ip addresses.
B.a drawback of the diffserv model is that it does not provide backward compatibility with devices that can only use the tos field.
C.diffserv uses the diffserv field in the MAC header to mark frames into behavior aggregates（BAs）
D.the diffserv field occupies the same eight bits of the mac header that were previously used for the tos field.
E.the first six high-order bits of the diffserv field are used to identify the resource reservation protocol（RSVP） value .
F.the primary goal of diffserv is scalabilty.

A. security services
B. TACACS+services
C. Mpls services
D. Routing services
E. Ppp0e services
F. Poe services

A. incoming interface.outgoing interface.ip precedence.and differentiated services code  P.oint（DSCP）.
B. Incoming interace.ip precedence.differentiated services code point（DSCP），and source or d.estination address.
C. Outgoing interface.ip precedence.differentiated services code point（DSCP）.and source or d.estination address.
D. Incoming interface .outgoing interface.ip precedence and differentiated code point s.ervices（DCPS）
E. Incoming interface .ip precedence .and source or destination address. 
F. Outgoing interface.ip precedence .and source or destination address.

A. telnet traffic originating from the router will be rate limited unless it is destined for hosts 10.1.1.1 or 10.1.1.2
B. the configuration will not rate limit any telnet traffic until it is applied to a router interface.
C. All telnet traffic destined for the router will be rate limited.
D. telnet traffic from hosts 10.1.1.1 and 10.1.1.2 destined for the router will not be rate limited.

A.to configure the location and addition of a wireless lan controller（WLC） using an ip address. 
B.to enable the ：on demand” location of a single rogue AP or rogue client.
C.to configure the communication with a location appliance.
D.to configure the location and addition of a wireless access point using an ip address.

A.weighted RED （WRED） orange or green labels
B.modular QoS CLI （MQC） application layer tags
C.Deficit Round Robin （DRR） precedence bits
D.header compression tags
E.MPLS experimental bits
F.FIFO Layer 2 descriptor labels （L2DL）

A.Layer 2
B.Layer 3
C.Layer 4
D.Layer 2 and Layer 3
E.Layer 3 and Layer 4

A.queue creation
B.determining packet drop thresholds
C.determining the random early detection method
D.traffic classification
E.queue scheduling
F.FIFO configuration

A.both traffic shaping and traffic policing cause retransmissions of connection-oriented protocols such as TCP
B.both traffic shaping and traffic policing support the marking and re-marking of traffic
C.the effects of traffic shaping and traffic policing when configured on a router are applied to outgoing traffic
D.traffic shaping queues excess traffic whereas traffic policing discards excess traffic
E.traffic shaping allows the traffic to exceed the bit rate whereas traffic policing prevents the traffic from exceeding the bit rate

A.prevent packets from being dropped
B.increase available bandwidth
C.reduce hardware errors
D.provide predictable network service
E.eliminate propagation delay
F.eliminate jitter and packet loss