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