249+ CISCO Exams Questions and Answers with Explanation

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 5511

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 5499

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

Workspace

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0 5452

Q:

You want to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?

A) Thicknet coax	B) Thinnet coax
C) Category 5 UTP cable	D) Fiber-optic cable

Answer & Explanation Answer: D) Fiber-optic cable

Explanation:

Fiber-optic cable provides a more secure, long - distance cable that is not susceptible to EMI interference at high speeds.

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0 5405

Q:

When a station sends a transmission to the MAC address ff : ff : ff : ff : ff : ff, what type of transmission is it?

A) Unicast	B) Multicast
C) Anycast	D) Broadcast

Answer & Explanation Answer: D) Broadcast

Explanation:

A transmission to the MAC address ff : ff : ff : ff : ff : ff is a broadcast transmission to all stations.

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0 5400

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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0 5398

Q:

What is the purpose of the DHCP server?

A - to provide storage for email
B - to translate URLs to IP addresses
C - to translate IPv4 addresses to MAC addresses
D - to provide an IP configuration information to hosts

Answer

Answer : D

Explanation:The main purpose of the DHCP server is to provide IP configuration parameters to hosts such as the default gateway, domain name, Domain Name System – DNS .

Workspace

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4 5373

Q:

How many non- overlapping channels are available with 802.11b?

A) 3	B) 12
C) 23	D) 40

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