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 CCNA Questions

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Q:

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?

A) PPP B) HDLC
C) Frame Relay D) ISDN
 
Answer & Explanation Answer: C) 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.

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Q:

What is the bit length and expression form of a MAC address?

Answer

48 bits (6 bytes) expressed as a hexadecimal number.

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Q:

Which switching technology reduces the size of a broadcast domain?

A) ISL B) 802.1Q
C) VLANs D) STP
 
Answer & Explanation Answer: C) VLANs

Explanation:

Virtual LANs break up broadcast domains in layer 2 switched internetworks.

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Q:

Which encryption type does WPA2 use?

A) AES - CCMP B) PPK via IV
C) PSK D) TKIP/MIC
 
Answer & Explanation Answer: A) AES - CCMP

Explanation:

WPA2 uses AES-CCMP for encryption. WPA uses TKIP

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Q:

With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?

A) Point-to-Point B) Backbone area 0
C) Broadcast multi-access D) Non-broadcast multi-access
 
Answer & Explanation Answer: A) Point-to-Point

Explanation:

No DR is assigned on any type of point-to-point link. No DR/BDR is assigned on the NBMA point-to-multipoint due to the hub/spoke  topology. DR and BDR are elected on broadcast and non-broadcast multi-access network. Frame relay is a non-broadcast multiaccess (NBMA) network by default.

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Q:

Which two descriptions are correct about characteristics of IPv6 unicast addressing? (Choose two)

A. Global addresses start with 2000::/3.
B. Link-local addresses start with FF00::/10.
C. Link-local addresses start with FE00:/12.
D. There is only one loopback address and it is ::1.

Answer

Answer : A , D


Explanation:


An IPv6 Unicast address identifies a single network interface. The Internet Protocol delivers packets sent to a unicast address to that specific interface.

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Q:

You need to gather the IP address of a remote switch that is located in Hawaii. What can you do to find the address?

A) Issue the show ip route command on the router connected to the switch B) Issue the show cdp neighbor command on the router connected to the switch
C) Issue the show ip arp command on the router connected to the switch D) Issue the show cdp neighbors detail command on the router connected to the switch
 
Answer & Explanation Answer: D) Issue the show cdp neighbors detail command on the router connected to the switch

Explanation:

Although option A is certainly the "best" answer, unfortunately option E will work just fine and your boss would probably prefer you to use the show cdp neighbors detail command.

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Q:

To test the IP stack on your local host, which IP address would you ping?

A) 127.0.0.0 B) 1.0.0.127
C) 127.0.0.1 D) 127.0.0.255
 
Answer & Explanation Answer: C) 127.0.0.1

Explanation:

To test the localstack on your host, ping the loop back interface of 127.0.0.1

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