CISCO Certification problems
- 1. What multicast addresses does RIPng use?
Options- A. FF02::A
- B. FF02::9
- C. FF02::5
- D. FF02::6 Discuss
Correct Answer: FF02::9
Explanation:
RIPng uses the multicast IPv6 address of FF02::9. If you remember the multicast addresses for IPv4, the numbers at the end of each IPv6 address are the same.
- 2. Which of the following is true when describing a multicast address?
Options- A. Packets addressed to a multicast address are delivered to a single interface
- B. packets are delivered to all interfaces identified with the address. This is also called a one-to-many address
- C. A multicast address identifies multiple interfaces and is delivered to only one address. This address can also be called one-to-one-of-many
- D. These addresses are meant for nonrouting purposes,but they are almost globally unique, so it is unlikely they will have an address overlap Discuss
Correct Answer: packets are delivered to all interfaces identified with the address. This is also called a one-to-many address
Explanation:
Packets addressed to a multicast address are delivered to all interfaces identified with the multicast address, the same as in IPv4. It is also called a one-to-many address. You can always tell a multicast address in IPv6 because multicast addresses always start with FF.
- 3. What does a link-local address always start with? Discuss
Correct Answer: FE80::/10
- 4. Suppose you have a customer who has a central HQ and six branch offices. The customer anticipates adding six more branches in the near future. It whishes to implement a WAN technology that will allow the branches to economically connect to HQ and you have no free ports on the HQ router. which of the following would you recommend?
Options- A. PPP
- B. HDLC
- C. Frame Relay
- D. ISDN Discuss
Correct Answer: Frame Relay
Explanation:
The key is "there are no free ports" on your router. Only Frame Relay can provide a connection to multiple locations with one interface, and in an economical manner no less.
- 5. When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?
Options- A. Supplied by the CSU/DSU
- B. By the far end router
- C. By the clock rate command
- D. By the Physical layer bits stream timing Discuss
Correct Answer: Supplied by the CSU/DSU
Explanation:
Clocking on a serial interface is always provided by the CSU/DSU (DCE device). However, if you do not have a CSU/DSU in your non-production test environment, then you need to supply clocking with the clock rate command on the serial interface of the router with the DCE cable attached.
- 6. The Acme Corporation is implementing dail-up services to enable remote-office employees to connect to the local network. The company uses multiple routed protocols,needs authentication of users connecting to the network, and since some calls will be long distance, needs callback support. Which of the following protocols is the best choice for these remote services?
Options- A. 802.1
- B. Frame Relay
- C. HDLC
- D. PPP Discuss
Correct Answer: PPP
Explanation:
PPP is your only option because HDLC and Frame RElay do not support these types of business requirements. PPP provides dynamic addressing , authentication using PAP or CHAP, and callback services.
- 7. Which of the following uses ATM as the Data Link layer protocol that's terminated at what's known as the DSLAM?
Options- A. DSL
- B. PPPoE
- C. Frame Relay
- D. Dedicated T1 Discuss
Correct Answer: DSL
Explanation:
ATM is the Data-Link layer protocol that's typically used over the DSL layer1 connection from the CPE and terminated at what's known as the DSLAM - an ATM switch that contains DSL interface cards, or ATU-Cs.
- 8. What is the full IPv6 address represented by FF02::130F:5? Discuss
Correct Answer: FF02:0000:0000:0000:0000:0000:130F:0005
- 9. What are the access, distribution, and core components of a North American phone number? Discuss
Correct Answer: The last four digits are the used at the access layer to identify a particular telephone The next three numbers are used at the distribution layer to identify an exchange that services several phone numbers The area code is used at the core level for routing between different regions
- 10. Convert FACE1234 16 to dotted decimal. Discuss
Correct Answer: Answer: FA 16 = 250 10, CE 16 = 206 10, 12 16 = 18 10, and 34 16 = 52 10 FACE1234 16 = 2502061852 dotted decimal
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