sábado, 6 de octubre de 2012

CCNA Discovery 1 respuestas, capítulo 4

DHomesb capítulo 4- CCNA  discovery 1, V4.0  Inglés

Q.1. Which definition describes the term Internet?
• a group of PCs connected together on a LAN 
• a group of PCs connected together by an ISP
• a network of networks that connects countries around the world 
• a worldwide collection of networks controlled by a single organization

Q.2. What type of connection point is a point of presence (POP)?
• between a client and a host 
• between two local networks 
• between a computer and a switch

• between an ISP and a home-based LAN 

Q.3. What is the term for the group of high-speed data links that interconnect ISPs?

• Internet LAN 
• ISP backbone 
• Internet gateways 
• Internet providers

• Internet backbone 

Q.4. Which device can act as a router, switch, and wireless access point in one package?

• hub 
• bridge 
• modem 
• repeater


Q.5. What are three characteristics of business class ISP service? (Choose three.) 
• fast connections 
• extra web space
• free Windows upgrade 
• cheapest cost available to all users
• additional e-mail accounts 
• replacement hardware at no cost 

Q.6. What is a major characteristic of asymmetric Internet service?

• Download speeds and upload speeds are equal. 
• Download speeds are slower than upload speeds

• Upload speeds and download speeds are different. 
• Upload speeds and download speeds are irrelevant. 

Q.7. Which three elements are required to successfully connect to the Internet? (Choose three.)

• an IP address 
• file sharing enabled

• a network connection 
• server services enabled

• access to an Internet service provider 
• an address obtained directly from the RIR 

Q.8. What term describes each router through which a packet travels when moving between source and destination networks?

• NOC 

• hop 
• segment 

Q.9. What does the tracert command test?

• NIC functionality 
• the ISP bandwidth

• the network path to a destination 
• the destination application functionality

Q.10. What type of end-user connectivity requires that an ISP have a DSLAM device in their network?
• analog technology 
• cable modem technology

• digital subscriber line technology 
• wireless technology 

Q.11. Why would an ISP require a CMTS device on their network?
• to connect end users using cable technology 
• to connect end users using analog technology 
• to connect end users using wireless technology 
• to connect end users using digital subscriber line technology

Q.12. Refer to the graphic. What type of cabling is shown?
• STP 
• UTP 
• coax

• fiber 

Q.13. Refer to the graphic. What type of cabling is shown?

• UTP 
• coax 
• fiber 

Q.14. Which two places are most appropriate to use UTP cabling? (Choose two.)

• between buildings
• in a home office network 
• where EMI is an issue 
• in a cable TV network
• inside a school building 
• in a manufacturing environment with hundreds of electrical devices

Q.15. What does adherence to cabling standards ensure?
• data security 
• no loss of signal 
• no electromagnetic interference

• reliable data communications 

Q.16. Refer to the graphic. What type of cable is shown?

• crossover 
• eight coax channels 
• multimode fiber 
• single-mode fiber 
• straight-through 

Q.17. What connector is used to terminate Ethernet unshielded twisted pair (UTP) cabling?

• ST 
• BNC 
• RJ-11

• RJ-45 

Q.18. Which two characteristics describe copper patch panels? (Choose two.)

• uses RJ-11 jacks
• uses RJ-45 jacks 
• supports only data transmissions

• allows quick rearrangements of network connections 
• forwards transmissions based on MAC addresses 

Q.19. What are two advantages of cable management? (Choose two.)

• requires no preplanning
• aids in isolation of cabling problems 
• protects cables from physical damage
• provides compliance with future standards 
• provides a short-term solution for cable installation

 Q.20. What are two common causes of signal degradation when using UTP cabling? (Choose two.)
• installing cables in conduit
• having improper termination 
• losing light over long distances 

• installing low quality cable shielding
• using low quality cables or connectors 

Q.21. What are three commonly followed standards for constructing and installing cabling? (Choose three.)
• pinouts 
• cable lengths
• connector color 

• connector types 
• cost per meter (foot)