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642-845 PDF DEMO:
QUESTION NO: 1
Which three statements about end-to-end delay are true? (Choose three.)
A. End-to-end delay is the sum of propagation delays, processing delays, serialization delays, and queuing delays.
B. Coast-to-coast end-to-end delay over an optical link is about 20 ms.
C. Processing delay depends on various factors, which include CPU speed, CPU utilization, IP switching mode, and router architecture.
D. Propagation and serialization delays are related to the media.
E. Propagation delay is the time it takes to transmit a packet and is measured in bits-per-second (bps).
F. Serialization delay is the time it takes for a router to take the packet from an input interface and put it into the output queue of the output interface.
Answer: ACD
QUESTION NO: 2
What three statements are true about the various deployments of the 802.1x Extensible
Authentication Protocol (EAP)? (Choose three.)
A. EAP-FAST has the ability to tie login with non-Microsoft user databases.
B. EAP-TLS supports static passwords.
C. PEAP supports one-time passwords.
D. LEAP does not support multiple operating systems.
E. LEAP supports Layer 3 roaming.
F. PEAP does not work with WPA.
Answer: ACE
QUESTION NO: 3
To have the best possible voice quality and to utilize effectively the available bandwidth, which queuing and compression mechanisms need to be used? (Choose two.)
A. class-based weighted fair queuing (CBWFQ)
B. low latency queuing (LLQ)
C. priority queuing (PQ) or custom queuing (CQ)
D. Real-Time Transport Protocol (RTP) header compression
E. TCP header compression
F. UDP header compression
Answer: BD
QUESTION NO: 4
Refer to the exhibit. What variation of the 802.1x Extensible Authentication Protocol (EAP) uses this authentication process?
A. LEAP
B. EAP-FAST
C. PEAP
D. EAP-TLS
Answer: A
QUESTION NO: 5
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
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Updated: May 27, 2022