CCNA Exams

CCNA Exams Answers


DHomesb Chapter 3 Exam Answers


Q.1. Which term is used to describe the process of placing one message format into another format so that the message can be delivered across the appropriate medium? • flow control
• encapsulation
• encoding
• multicasting
• access method


Q.2. Refer to the graphic. Five PCs are connected through a hub. If host H1 wants to reply to a message from host H2, which statement is true?

 H1 sends a unicast message to H2, but the hub forwards it to all devices.
• H1 sends a unicast message to H2, and the hub forwards it directly to H2.
• H1 sends a broadcast message to H2, and the hub forwards it to all devices.
• H1 sends a multicast message to H2, and the hub forwards it directly to H2. 
Q.3. Which two statements concerning networking standards are true? (Choose two.)
• adds complexity to networks
• encourages vendors to create proprietary protocols

• provides consistent interconnections across networks
• ensures that communications work best in a single-vendor environment

• simplifies new product development 

Q.4. What does the 100 mean when referencing the 100BASE-T Ethernet standard?
• type of cable used
• type of data transmission

• speed of transmission
• type of connector required
• maximum length of cable allowed 

Q.5. Which address does an NIC use when deciding whether to accept a frame? • source IP address
• source MAC address
• destination IP address

• destination MAC address
• source Ethernet address 

Q.6. Which type of address is used in an Ethernet frame header? • logical addresses only
• IP addresses only

 MAC addresses only
• broadcast addresses only 
Q.7. What is the function of the FCS field in an Ethernet frame?

• detects transmission errors
• provides timing for transmission
• contains the start of frame delimiter
• indicates which protocol will receive the frame

Q.8. What is the purpose of logical addresses in an IP network? • They identify a specific NIC on a host device.
• They are used to determine which host device accepts the frame.
• They provide vendor-specific information about the host.

• They are used to determine the network that the host is located on.
They are used by switches to make forwarding decisions. 

Q.9. Which device accepts a message on one port and always forwards the message to all other ports? • modem
• switch
• router

• hub 
Q.10. Which two networking devices are used to connect hosts to the access layer? (Choose two.)

• router
• hub
• switch

• server
• computer

 Q.11. Host A needs to learn the MAC address of Host B, which is on the same LAN segment. A message has been sent to all the hosts on the segment asking for the MAC address of Host B. Host B responds with its MAC address and all other hosts disregard the request. What protocol was used in this scenario?  

 • ARP
• WINS  

Q.12. A switch receives a frame with a destination MAC address that is currently not in the MAC table. What action does the switch perform?

 • It drops the frame.
• It sends out an ARP request looking for the MAC address.

• It floods the frame out of all active ports, except the origination port.
• It returns the frame to the sender.  

Q.13. What is a benefit of having a router within the distribution layer?

• prevents collisions on a local network
• keeps broadcasts contained within a local network
• controls which hosts have access to the network
• controls host-to-host traffic within a single local network 

Q.14. Refer to the graphic. What does the router do after it determines that a data packet from Network 1 should be forwarded to Network 2?
• It sends the data packet as it was received.
• It reassembles the frame with different MAC addresses than the original frame.
• It reassembles the data packet with different IP addresses than the original data packet.
• It reassembles both the packet and the frame with different destination IP and MAC addresses.  


Q.15. Which table does a router use to make decisions on where a data packet is to be sent? • ARP table • routing table
• network table
• forwarding table 

Q.16. If the default gateway is configured incorrectly on the host, what is the impact on communications? • The host is unable to communicate on the local network.

• The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
• The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
• There is no impact on communications. 

Q.17. What device is typically used as the default gateway for a computer? • a server hosted by the ISP

• the router interface closest to the computer
• a server managed by a central IT department
• the switch interface that connects to the computer 

Q.18. If a router receives a packet that it does not know how to forward, what type of route must be configured on the router to prevent the router from dropping it?

• dynamic route
 default route
• destination route
• default destination  

Q.19. Which two items are included in a network logical map? (Choose two.)

• naming scheme
• IP addressing scheme

• length of cable runs
• physical location of networking devices
• specific layout of interconnections between networking devices and hosts 

Q.20. An integrated router can normally perform the functions of which two other network devices? (Choose two.) • NIC

• switch
• e-mail server
• application server

• wireless access point 

Q.21. What is a reason for disabling simple file sharing? • It enables the user to map a remote resource with a local drive.
• It enables the user to share all files with all users and groups.
• It enables the user to share printers.

• It enables the user to set more specific security access levels
[vqr msg=””/]