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Cisco CCNA, CCENT, And CCNP Exam Practice Questions: Hex Conversions, HDLC, PPP, And More!

Test your knowledge of vital Cisco certification exam topics such as HDLC, PPP, hex conversions, IPv6, and more with these complimentary practice questions!

Letís test your knowledge of hexadecimal conversions, router defaults, IPv6, and more with these Cisco certification exam practice questions!

CCENT Certification:Short answer: What is the decimal equivalent of the hex value Fa8?Answer: We have 15 ("F") units of 256, 10 ("a") units of 16, and 8 units of 1.3840 + 160 + 8 = 4008CCNA Certification:What is the default encapsulation type of a Cisco Serial interface?A. HDLCB. PPPC. ISDND. Frame RelayE. ATMF. There is no default encap type - when you open a Cisco router's Serial interface, there is no encapsulation present.Answer: A. The default encapsulation type on a Cisco serial interface is High Data-Link Control (HDLC), as verified here by the output of show interface serial0. This particular interface is shut down, but you can still see the default encap type!R1#show interface s0Serial0 is administratively down, line protocol is down Hardware is HD64570 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,reliability 255/255, txload 1/255, rxload 1/255 Encapsulation HDLC, loopback not set CCNP Certification / BSCI Exam:Which of the following statements are true regarding the expression of a single IPv6 address?A. There is no limit on zero compression.B. There is no limit on leading zero compression.C. There is a limit on how many times you can use zero compression.D. There is a limit on how many times you can use leading zero compression.Answer: B, C. Zero compression is the act of replacing blocks of zeroes with double-colons and can only be used once in a single address. Leading zero compression is the act of dropping leading zeroes in a single block, and there is no limit in how many times you can do this in an IPv6 address. Just remember to leave at least one number in such a block!CCNP Certification / BCMSN Exam:Short answer: What command is used to place individual switch ports into an Etherchannel?Extra credit: How many physical channels can be placed into an Etherchannel?Answer(s): Use the channel-group command to place ports into an Etherchannel. To get the extra credit ;), you should know that you can place up to eight physical channels into an EC.CCNP Certification / ISCW Exam:Identify the true statements regarding Authentication Header.A. AH uses IP protocol number 50.B. AH uses IP protocol number 51.C. AH authenticates the header.D. AH does not authenticate the header.E. AH encrypts the packet's payload.F. AH does not encrypt the packet's payload.Answers: B, C, F. AH uses protocol number 51, and it does authenticate the header - after all, it's Authentication Header! AH does not encrypt the payload itself, though.CCNP Certification / ONT Exam:What type of delay is defined as the amount of time it takes a packet to be transferred from the input interface of a router to the output interface?A. Queueing delayB. Propagation delayC. Processing delayD. Serialization delayAnswer: C. That might sound like queueing delayFind Article, but it's actually the description of a processing delay.Look for more Cisco certification exam practice questions on this same website!

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Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage (, home of free>CCNP Boot Camp tutorials!

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