CCNA 1 Chapter 08

Cisco CCNA1-Chapter-08  Correct Questions Answers 100%

01. 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 .

02. 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.

03. 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.

04. 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.

05. 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.

06. 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.

07. 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.

08. Which method of signal transmission uses radio waves to carry signals?

• electrical;
• optical;
• wireless ;
• acoustic .

09. What are three measures of data transfer? (Choose three.)

• goodput;
• frequency ;
• amplitude ;
• throughput ;
• crosstalk ;
• bandwidth .

10.Which type of cable run is most often associated with fiber-optic cable?

• backbone cable;
• horizontal cable;
• patch cable;
• work area cable

11. 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

12. 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.

13. In most business LANs, which connector is used with twisted-pair networking cable?

• BNC;
• RJ-11 ;
• RJ-45 ;
• Type F .

14. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?

• Presentation;
• Transport;
• Data Link;
• Physical .

15. Which fiber connector supports full duplex Ethernet?
   This one
16.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.

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.

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