1. which two qos fields should be used by r1 and r2 to classify the traffic sent from pc1 to server1? (choose two.)
a. cos
b. ip dscp
c. de bit
d. priority bits
e. ip precedence
answer: be
2. which classification tool can be used to classify traffic based on the http url?
a. class-based policing
b. policy-based routing (pbr)
c. committed access rate (car)
d. network-based application recognition (nbar)
e. dial peers
answer: d
3. which two statements are true about the function of cac? (choose two.)
a. cac provides guaranteed voice quality on a link.
b. cac artificially limits the number of concurrent voice calls.
c. cac is used to control the amount of bandwidth that is taken by a call on a link.
d. cac prevents oversubscription of wan resources that is caused by too much voice traffic.
e. cac allows an unlimited number of voice calls while severely restricting, if necessary, other forms of traffic.
f. cac solves voice congestion problems by using qos to give priority to udp traffic.
answer: bd
4. which two statements are true about the implementation of qos? (choose two.)
a. implementing diffserv involves the configuration of rsvp.
b. implementing intserv allows qos to be performed by configuring only the ingress and egress devices.
c. implementing intserv involves the utilization of rsvp.
d. traffic should be classified and marked by the core network devices.
e. traffic should be classified and marked as close to the edge of the network as possible.
answer: ce
5. what three types of interfaces do voice gateways use to connect to analog interfaces? (choose three.)
a. e and m
b. e1 ccs
c. fxs
d. fxo
e. serial
f. t1 cas
answer: acd
6. which two CISCO router functional planes are protected by control plane policing (copp)? (choose two.)
a. data plane
b. control plane
c. service plane
d. management plane
e. hyper plane
answer: ad
7. qos preclassification is a term used to describe what cisco ios feature?
a. autoqos
b. modular qos command-line interface
c. qos for vpns
d. autosecure
answer: c
8. for which two network problems would qos be a good solution? (choose two.)
a. serialization delay
b. end-to-end delay
c. lack of bandwidth
d. inconsistent port costs
e. routing table convergence issues
f. poor file transfer rates
answer: bc
9. what are two steps to define a qos policy? (choose two.)
a. set a minimum bandwidth guarantee.
b. increase bandwidth.
c. determine a specific transfer rate.
d. establish timers.
e. configure cbwfq for best-effort traffic.
f. set a maximum bandwidth limit.
answer: af
10. which 802.1x extensible authentication protocol (eap) type supports authentication using digital certificates?
a. eap-tls
b. eap-fast
c. leap
d. wpa
answer: a
11. which three configuration tasks are required to successfully deploy nbar to recognize tcp and udp stateful protocols? (choose three.)
a. over leased lines, use the multilink ppp command to reduce latency and jitter, and to create distributed link fragmentation and interleaving.
b. use the service-policy command to attach a traffic flow to an interface on the router.
c. use the ip rsvp bandwidth command to set a strict upper limit on the bandwidth nbar uses, and to guarantee admission of any flows.
d. use the policy-map command to define one or more qos policies (such as shaping, policing, and so on) to apply to traffic defined by a class map.
e. use the random-detect dscp command to modify the default minimum and maximum thresholds for the dscp value.
f. use the class-map command to define one or more traffic classes by specifying the criteria by which traffic is classified.
answer: bdf
12. which codec standard would provide the highest voice-quality, mean opinion score (mos)?
a. g.711, pcm
b. g.728, ldcelp
c. g.729, cs-acelp
d. g.729a, cs-acelp
answer: a
13. which two voice-gateway, analog-interface statements are true? (choose two.)
a. a router can use a foreign exchange Office (fxo) interface to connect to a pstn.
b. a router can use a foreign exchange station (fxs) interface to connect to a pbx.
c. an analog fax machine can connect to a foreign exchange office (fxo) interface.
d. an analog telephone can connect to a foreign exchange station (fxs) interface.
answer: ad
14. refer to the exhibit. both routers have been configured as voip gateways. they must also support traditional telephony devices to connect to analog telephones. which two configuration changes would correctly support the voice requirements? (choose two.)
a. on each router, under the dial-peer voice 1 pots configuration, add the port fa0/0 command.
b. on each router, under the dial-peer voice 1 pots configuration, add the port 1/0/0 command.
c. on each router, configure dial-peer voice 1 as a voip connection and configure dial-peer voice 2 as a pots connection.
d. under the dial-peer voice 1 pots configuration, change the destination pattern of 1111 to 2222 on the r1 router, and 2222 to 1111 on the r2 router.
e. under the dial-peer voice 2 voip configuration, change the destination pattern of 1111 to 2222 on the r1 router, and 2222 to 1111 on the r2 router.
f. under the dial-peer voice 2 voip configuration, change the destination target address of 10.2.2.2 to 10.1.1.1 on the r1 router, and the destination target address of 10.1.1.1 to 10.2.2.2 on the r2 router.
answer: be
15. drag each wlse feature on the left to its benefit on the right.
