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 CISCO Certification Questions

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Q:

What is meant by same layer interaction

A) That a packet is forwarded to a different host that resides in the same layer of the Cisco three layer hierarchical model. B) That an interaction occurs within a single layer of a networking model and that no other layers or devices take any part in the interaction.
C) An interaction that progresses up or down only one level of a networking model. D) That two computers use a protocol defined at the same layer of a networking model to communicate with each other.
 
Answer & Explanation Answer: D) That two computers use a protocol defined at the same layer of a networking model to communicate with each other.

Explanation:
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Filed Under: CCENT

0 5475
Q:

When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?

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
 
Answer & Explanation Answer: A) 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.

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0 5448
Q:

If a hub has three computers connected to it, how many broadcast and collision domains is the hub creating?

A) Three broadcast and one collision B) Three broadcast and three collision
C) one broadcast and three collision D) One broadcast and one collision
 
Answer & Explanation Answer: D) One broadcast and one collision

Explanation:

If a hub has three computers connected to it, one broadcast and one collision domain is created

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Filed Under: CCNA

0 5203
Q:

Which three IP addresses can be assigned to hosts if the subnet mask is /27 and subnet zero is usable?

A. 10.15.32.17
B. 17.15.66.128
C. 66.55.128.1
D. 135.1.64.34
E. 129.33.192.192
F. 192.168.5.63

Answer

Answer : A C D


 


 


 


Explanation: If you follow the cram table,  /27 is mask 255.255.255.224. 3 bits were borrowed with value of 32. Follow the fourth octets of the addresses:
A is a usable host address.
B is classified as a network address
C is a usable host address form the subnet 0
D is a usable host address
E is a network address
F is a broadcast address

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Subject: CCNA

14 5113
Q:

Refer to the exhibit. Which statement describes DLCI 17?

A: DLCI 17 describes the ISDN circuit between R2 and R3.
B: DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.
C: DLCI 17 is the Layer 2 address used by R2 to describe a PVCto R3.
D: DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.

Answer

Answer : C


Explanation:


Virtual circuits (VC)s are identified by DLCIs. DLCI values typically are assigned by the Frame Relay service provider. Frame Relay DLCIs have local significance.  A DLCI identifies a VC to the equipment at an endpoint. A DLCI has no significance beyond the single link. Two devices connected by a VC may use a different DLCI value to refer to the same connection.


Virtual circuits (VC)s are identified by DLCIs. DLCI values typically are assigned by the Frame Relay service provider. Frame Relay DLCIs have local significance.  A DLCI identifies a VC to the equipment at an endpoint. A DLCI has no significance beyond the single link. Two devices connected by a VC may use a different DLCI value to refer to the same connection. - See more at: https://www.orbitco-ccna-pastquestions.com/CCNA-Past-Questions%3A-WAN.php#sthash.nWKdjylM.dpuf
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Subject: CCNA

0 5104
Q:

A wireless client cannot connect to an 802.11b/g BSS with a b/g wireless card. The client section of the access point does not list any active WLAN clients. What is a possible reason for this?

A) The incorrect channel is configured on the client B) The Client's IP address is on the wrong subnet
C) The client has an incorrect pre-shared key D) The SSID is configured incorrectly on the client
 
Answer & Explanation Answer: D) The SSID is configured incorrectly on the client

Explanation:

Although this question is cryptic at best, the only possible answer is option D. If the  SSID is not being broadcast (which we must assume in this question), the client must be configured with the correct SSID in order to associate to the AP.

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0 5077
Q:

A switch has been configured configured for three different VLANs : VLAN2, VLAN3 and VLAN4. A router has been added to provide communication between the VLANs. What minimum type of interface necessary on the router if only one connection is to be made between the router and the switch?

A) 10Mbps Ethernet B) 56Kbps Serial
C) 100Mbps Ethernet D) 1Gbps Ethernet
 
Answer & Explanation Answer: C) 100Mbps Ethernet

Explanation:

Although you can use either 100Mbps or 1Gbps Ethernet, the 100Mbps is necessary at a minimum and is the best answer to this question. You need to trunk the link from the switch to the router to make this connection work with inter-VLAN communication.

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0 5062
Q:

Which of the following allows a router to respond to an ARP request that is intended for a remote host?

A) Gateway DP B) Reverse ARP (RARP)
C) Proxy ARP D) Inverse ARP (IARP)
 
Answer & Explanation Answer: C) Proxy ARP

Explanation:

Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.

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