CCNA 1 - Module 8 Exam Answers

1	What are the five elements that make up the fiber-optic cable? core, cladding, buffer, strength material, and outer jacket core, cladding, kevlar, strength material, and outer jacket core, kevlar, buffer, strength material, and outer jacket aramid yarn, cladding, buffer, strength material, and outer jacket
2	In a UTP crossover cable, which pairs of pins are crossed? (Choose two.) 1 and 2 3 and 5 7 and 8 3 and 6 5 and 7 1 and 3

3	Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B? coax cable rollover cable crossover cable straight-through cable
4	Which of the following is a characteristic of single-mode fiber-optic cable? generally uses LEDs as the light source relatively larger core with multiple light paths less expensive than multimode generally uses lasers as the light source

5	Which method of signal transmission uses radio waves to carry signals? electrical optical wireless acoustic
6	Which characteristics describe fiber optic cable? (Choose two.) It is not affected by EMI or RFI. Each pair of cables is wrapped in metallic foil. It combines the technique of cancellation, shielding and twisting to protect data. It has a maximum speed of 100 Mbps. It is the most expensive type of LAN cabling.

7	When is a straight-through cable used in a network? when connecting a router through the console port when connecting one switch to another switch when connecting a host to a switch when connecting a router to another router
8	Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication? Presentation Transport Data Link Physical

9	In most business LANs, which connector is used with twisted-pair networking cable? BNC RJ-11 RJ-45 Type F
10	What encoding scheme does 100 Mbps Fast Ethernet use? Manchester Differential Manchester 4B/5B 5B/6B

11	An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device? light injector OTDR TDR multimeter
12	In which of the following situations would a crossover cable be used? (Choose two.) switch to router switch to PC router to PC switch to hub hub to router

13	Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication? Presentation Transport Data Link Physical

14

What is a possible effect of improperly applying a connector to a network cable? Data will be forwarded to the wrong node. Data transmitted through that cable may experience signal loss. An improper signaling method will be implemented for data transmitted on that cable. The encoding method for data sent on that cable will change to compensate for the improper connection.

15

Which characteristics describe fiber optic cable? (Choose two.) It is not affected by EMI or RFI. Each pair of cables is wrapped in metallic foil. It combines the technique of cancellation, shielding and twisting to protect data. It has a maximum speed of 100 Mbps. It is the most expensive type of LAN cabling.

16	When is a straight-through cable used in a network? when connecting a router through the console port when connecting one switch to another switch when connecting a host to a switch when connecting a router to another router

17	Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B? coax cable rollover cable crossover cable straight-through cable

18	Which method of signal transmission uses radio waves to carry signals? electrical optical wireless acoustic

19	What are three measures of data transfer? (Choose three.) goodput frequency amplitude throughput crosstalk bandwidth

20	Which of the following is a characteristic of single-mode fiber-optic cable? generally uses LEDs as the light source relatively larger core with multiple light paths less expensive than multimode generally uses lasers as the light source

21	An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device? light injector OTDR TDR multimeter

22	Which fiber connector supports full duplex Ethernet? ******************

23

With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs? the magnetic field around the adjacent pairs of wire the use of braided wire to shield the adjacent wire pairs the reflection of the electrical wave back from the far end of the cable the collision caused by two nodes trying to use the media simultaneously

24	What characteristic of UTP cable helps reduce the effects of interference? the metal braiding in the shielding the reflective cladding around core the twisting of the wires in the cable the insulating material in the outer jacket

25	XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.) coax Cat4 UTP Cat5 UTP Cat6 UTP STP

26	In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling? coax fiber Cat5e UTP Cat6 UTP STP

27	What is a primary role of the Physical layer in transmitting data on the network? create the signals that represent the bits in each frame on to the media provide physical addressing to the devices determine the path packets take through the network control data access to the media

28	Which type of cable run is most often associated with fiber-optic cable? backbone cable horizontal cable patch cable work area cable

29	What is considered a benefit of wireless as a media choice? more host mobility lower security risks reduced susceptibility to interference less impact of the surroundings on the effective coverage area

30	In most business LANs, which connector is used with twisted-pair networking cable? BNC RJ-11 RJ-45 Type F

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31. What is characteristic of the operation of a Layer 2 switch?
• forwards data based on logical addressing
• duplicates the electrical signal of each frame to every port
• learns the port assigned to a host by examining the destination MAC address
• uses the destination MAC address to determine the specific interface to forward a frame

32. Two newly hired technicians are discussing the implementation of a new LAN. One technician proposes installing a hub. The other technician advises installing a switch. Which statements are true about the differences between a hub and a switch? (Choose two.)
• A hub operates at Layer 2 of the OSI model.
• A hub reduces the number of collisions on a LAN.
• A hub works at a higher OSI model layer than a switch.
• A switch provides more throughput to hosts on a LAN
• A switch provides a collision-free environment on a LAN.
• The number of collisions on a LAN are the same whether a hub or a switch is used.

33.

Refer to the exhibit. Forty-eight workstations are connected to a hub. The users are able to connect to the network, but access is very slow. An entry-level technician replaces the 10 Mbps hub with 100 Mbps hub but the problem still exists. What is the most economical way to correct the problem?
• Replace the hub with a switch.
• Replace the hub with a router.
• Replace the hub with a 1 Gbps hub.
• Replace the hub with a 10 Mbps fiber hub.

34.

Exhibited is a portion of ABC Company internetwork. Which of the connections can be full duplex?
• segments 1 and 2
• segment 2
• segments 3 and 4
• segments 2, 3, and 4
• segments 1, 2, 3, and 4

35.

Refer to the exhibit. The switch and the hub have default configurations, and the switch has built its CAM table. Which of the hosts will receive the data when workstation A sends a unicast packet to workstation C?
• workstation C
• workstations B and C
• workstations B, C, and the E0 interface of the router
• workstations B, C, D, E, F, and the E0 interface of the router

36. An administrator would like to connect ten workstations on a 192.168.0.0/24 network. The device selected by the administrator must allow connectivity between hosts without sharing bandwidth. Which device would be appropriate?
• hub
• router
• switch
• repeater

37. Which networking devices use the MAC address to make forwarding decisions? (Choose two.)
• NIC
• bridge
• hub
• switch
• repeater

38. Which devices are primarily used to extend cable segments within a collision domain by regenerating the data signals? (Choose two.)
switch
• repeater
• router
• bridge
• hub

39. Which devices will create multiple collision domains in an Ethernet network? (Choose two.)
• NIC
• hub
• switch
• router
repeater

40.

Refer to the exhibit. How many broadcast domains exist in classroom 240?
• 1
• 2
• 5
• 12
• 13
• 15

41. A PC receives a frame. Which situation will cause the NIC on the receiving host to pass the frame contents up the OSI layers to be processed by the PC?
• The frame is a runt frame.
• The destination MAC address of the frame is FFFF.FFFF.FFFF.
• The transmitting host generated a jam signal during the frame transmission.
• The recalculated checksum for the frame does not match the FCS on the frame.

42. A network administrator has a multi-floor LAN to monitor and maintain. Through careful monitoring, the administrator has noticed a large amount of broadcast traffic slowing the network. Which device would you use to best solve this problem?
• bridge
• hub
• router
• transceiver

43. What will a bridge do if it receives a frame with a MAC address that is not within the table?
• discard frame
• ignore frame
• send frame to appropriate port
• send frame to all ports except source port

44. Which networking device reduces the size of both collision domains and broadcast domains?
• hub
• Layer 2 switch
• router
• bridge
• repeater

45. What is used to prevent Layer 2 switching loops?
• bridging
• segmentation
• Address Resolution Protocol
• Spanning-Tree Protocol