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The Complete One-Week Preparation for the CISCO CCENT/CCNA ICND1 Exam 640-822
A Certification Guide Based over 2000 Sample Questions and Answers with Explanations Second Edition (July 2010)
By Thaar AL_Taiey
iUniverse, Inc.
Copyright © 2010 Thaar AL_Taiey
All right reserved.
ISBN: 978-1-4502-3705-5
Chapter One
INTERNETWORKING ESSENTIALS
In this chapter, some fundamental concepts and terms that can be used in the internetworking are described. This chapter summarizes some common themes presented throughout the remainder of this book. The chapter focuses mainly on mapping the Open System Interconnection (OSI) model to networking and internetworking functions; OSI model represents the building blocks for internetworks. The advantages of networking models are also stated in this chapter. Understanding the conceptual model helps understanding the complex pieces that make up an internetwork. This chapter also describes in details the concepts of Networking, Internetworking, Physical and Logical Network Topologies, and Ethernet LAN.
Many multiple-choices single-answer, multiple-choices multiple-answers, fill-in-the-blank, and testlet test formats will emphasize the following topics in this chapter:
* Networking essentials * Internetworking essentials * Internetworking evolving * Internetworking models * OSI reference model * OSI encapsulation and de-encapsulation terminologies * Ethernet LANs * Data transmission types * CSMA/CD algorithm * Ethernet addressing * Ethernet connection and cabling
By understanding perfectly the 312 questions and their answers, and the information presented in this chapter, understanding OSI reference model, understanding Ethernet LAN, and answering CCNA/CCENT exam related questions will be guaranteed. The main questions herein are intended to reflect the type of questions presented on the CCENT Test.
Networking Essentials
In this section, networking essentials are presented and the types of networking topologies are described.
1-1. Try to decide which option gets in which blank.
A network is a collection of ___________ (NICs-Network Interface Cards, routers, switches, firewalls) and __________ (PCs, servers) interconnected together by some means.
A. end systems machines
B. connection devices
NIC, router, switch, and firewall devices will be discussed deeply throughout this book.
1-2. Try to decide which option gets in which blank.
Networks carry data in many types of environments, including _____, and up to _______.
A. homes
B. large enterprises
1-3. Try to decide which option gets in which blank.
Networks also carry data in many types of media including ________ and _______. To accomplish it tasks, networks use many types of connection devices such as NICs, hubs, bridges, switches and routers.
A. wired
B. wireless
1-4. Which of the following statements are correct about networks? (Select all that apply)
A. A main office usually has one large enterprise network to connect all users and employees.
B. A main office with large enterprise network can have thousands of employees and users who depend on this network to do their jobs and business. By network, employees and users have access to all information and resources that are accessible by the network.
C. A network is a connected of several types of devices that can communicate with each other.
D. Networks carry data in many types of environments, including homes, and up to large enterprises.
E. Remote users can connect to a main office through internet or WAN networks.
F. Networks can be wired or wireless.
Network Functions and Benefits
1-5. Try to decide which options get in the blank. Today, the main function of computer networks, in addition to share and to exchange information between computer machines is to provide _________.
A. transportation
B. communication
C. assistance
1-6. TRUE/FALSE: In business, networks play a major role; it simplifies and streamlines business processes using data, application, and hardware sharing.
A. TRUE
B. FALSE
1-7. TRUE/FALSE: Networks make rapidly data and information exchanging. Therefore, business's resources can be used more efficiently. However, several types of resources can be shared by computer networks.
A. TRUE
B. FALSE
1-8. Which of the following resources can be shared by the networks? (Select all that apply)
A. Data and applications
B. Physical resources
C. Network storage
D. Backup devices
E. Networking devices and media
1-9. Users of the network can use many types of networking applications. This includes but is not limited to: (Select all that apply)
A. E-mail
B. Web browsers
C. Internet talk
D. instant messaging
E. Download application
F. Broadcasting alerter
G. RSS feeds
H. Books' reader
I. Collaboration
J. Database
1-10. There are several types of application interaction using the network. These are: (Select all that apply)
A. system-to-system batch applications
B. user interactive applications
C. user real-time applications
Note: The terms found in Q 1-10 and several other terms in this chapter are given without further discussions because they are out of the scope of CCENT exam and this book does not want to confuse the reader by extra-information. However, more details about these terms can be found from www.google.com.
1-11. Networks can be described and compared according to network performance and structured. This includes: (Select all that apply)
A. Speed
B. Cost
C. Security
D. Availability
E. Scalability
F. Reliability
G. Manageability
H. Topology
1-12. TRUE/FALSE: Today, cost of the network becomes less affecting factor when selecting the network and factors such as speed, security and easily managed network become the main factors for selecting the network. However, this depends on the importance of the network to the business process.
A. TRUE
B. FALSE
1-13. Which of the following resources are not sharable on the network? (Select all that apply)
A. applications
B. peripherals
C. memory
D. storage devices
E. data
F. processors
G. graphic adapter
H. mother board
1-14. Which of the following is a common network application? (Select all that apply)
A. e-mail
B. Internet talk
C. instant messaging
D. collaboration
E. Download application
F. Broadcasting alerter
G. graphics creation
H. RSS feeds
I. Book's reader
J. databases
K. word processing
L. spreadsheets
M. Web browsers
1-15. Match the following network characteristics to their suitable definitions.
1. speed 2. security 3. manageability 4. availability 5. scalability 6. reliability 7. cost 8. topology
A. The protection-ability level for all network resources B. The administer-ability level to all network resources C. The expandability of the network to accommodate the future expansion, such as more users or more data transmission D. The dependability of the network E. The easy-ability to access the network by users F. The overall price of network components: This includes installation, and maintenance. G. The physical and logical structure of the network H. The fast-ability of transmitting data over the network
Physical and Logical Network Topologies
1-16. Try to decide which option gets in which blank.
Topology defines the ______ method used between devices including the layout of the _______ and all paths used in___________.
A. Interconnection
B. cabling
C. data transmissions
1-17. Try to decide which option gets in which blank. Networks have two types of topologies. These are the _________ and the __________.
A. logical topology
B. physical topology
1-18. Match each of the following network's topologies to its suitable definition.
1. physical topology
2. logical topology
A. It is the arrangement of the network (nodes) devices, end systems (laptops, PCs and servers) and the network cables in wired networks.
B. It is, on the other hand, the mapping of the data flows between the nodes in the network that forming the physical topology.
Physical Network Topology
As stated above, the physical topology is the arrangement of the network devices, end systems (laptops, PCs and servers) and the network cables in wired networks. Some of these topologies are depending on the type of cabling that will be installed. Types of cables that are used in the network will be described in the following sections.
1-19. TRUE/FALSE: The three basic categories of physical topologies are Bus, Ring, and Star.
A. TRUE
B. FALSE
Figure 1-1 shows the basic physical topologies used in networking.
Bus Topology
1-20. TRUE/FALSE: In bus topology, all network devices and automated machines are cabled together in a line. Each machine is connected to the single bus cable through some kind of connector. The main cable segment must end with a terminator that absorbs the electrical signal when it reaches the end of the cable.
A. TRUE
B. FALSE
1-21. Which of the following is an advantage/disadvantage of the bus topology?
A. Since only one cable is utilized, it can be the single point of failure. If the network cable breaks, the entire network will be down.
B. Using only one cable will make the transfer speed between the computers on the network is faster.
1. Advantage
2. Disadvantage
1-22. Try to decide which option gets in which blank.
The bus topology includes both _____ and _______topologies. An example of this topology is a ______ Ethernet cable.
A. linear bus
B. distributed bus
C. Thinnet
D. Thicknet
Ring Topology
1-23. TRUE/FALSE: In ring topology, all network devices and automated machines are cabled together with the first device connected to the last to form a ring. This means that each machine is connected to the network in a closed loop or ring.
A. TRUE
B. FALSE
1-24. TRUE/FALSE: In a ring topology, data is transmitted within a "token." Token travels around the ring. If a machine wants to transmit data, it adds that data and the destination address to the token. The token move around the ring until it finds the destination device, which takes the data out of the token.
A. TRUE
B. FALSE
1-25. Which of the following is an advantage/disadvantage of the ring topology?
A. In this topology, there are no token collisions occur.
B. The failure of one machine will cause the entire network to fail.
1. Advantage
2. Disadvantage
1-26. Try to decide which option gets in which blank.
Two types of ring topology exist: _______ and________. As names imply, the first one uses one ring, whereas the second one uses two rings to transmit the token. The dual-ring uses two rings to allow token to be sent in_________. This design provides _________as compared with single-ring design, meaning that if one ring fails, token can be transmitted on the second ring.
A. single-ring
B. dual-ring
C. both directions
D. redundancy
Star Topology
1-27. TRUE/FALSE: In star topology, all network devices and automated machines are connected together by a central cabling device. In local area networks where the star topology is used, each machine is connected to a hub/switch.
A. TRUE
B. FALSE
1-28. TRUE/FALSE: Star topology will provide each machine on the network a dedicated, point-to-point connection to the central hub/switch.
A. TRUE
B. FALSE
1-29. Which of the following is an advantage/disadvantage of the star topology?
A. In star topology, there is simplicity of adding other machines. B. In star topology when a cable, which connects one machine to a central hub/switch, is broken, only that one machine is affected and disconnected from the network, and the rest of the network remains operational. This is important and it is the reasons why almost every newly designed Ethernet LAN based on a physical star topology. C. In star topology, there is a central hub/switch, which represents a single point of failure. If the hub/switch were to fail, the entire network would fail because of the hub/switch being connected to every machine on the network. 1. Advantage 2. Disadvantage
1-30. TRUE/FALSE: Almost every newly designed Ethernet LAN is based on a physical star topology.
A. TRUE
B. FALSE
1-31. TRUE/FALSE: In star topology, if the hub/switch were to fail the entire network would fail because of the hub/switch being connected to every machine on the network.
A. TRUE
B. FALSE
1-32. Which of the following is a type of the star topology? (Select all that apply)
A. extended-star topology
B. distributed-star topology
1-33. Which of the following is true about extended-star topology? (Select all that apply)
A. When a network is expanded to include an additional network device that is connected to the main network devices, the topology is referred to as an extended-star topology. B. A common deployment of this topology is in a hierarchical (Tree) design network such as a Campus LAN or an Enterprise or a WAN. Figure 1-2 shows the tree physical topology. C. Today, most extended-star networks employ a redundant connection to a separate set of connection devices to prevent isolation in the event of a device failure, especially the central node (Core switch, router, and firewall), since if one of these devices fails, a large portion of the network can become isolated. D. Distributed-star topology is composed of individual networks that are based upon the physical star topology connected together in a linear fashion, i.e., 'daisy-chained'. Therefore, the distributed-star topology has no central connection.
1-34. Which of the following is true about distributed-star topology? (Select all that apply)
A. When a network is expanded to include an additional network device that is connected to the main network devices, the topology is referred to as an extended-star topology. B. A common deployment of this topology is in a hierarchical (Tree) design network such as a Campus LAN or an Enterprise or a WAN. Figure 1-2 shows the tree physical topology. C. Today, most extended-star networks employ a redundant connection to a separate set of connection devices to prevent isolation in the event of a device failure, especially the central node (Core switch, router, and firewall), since if one of these devices fails, a large portion of the network can become isolated. D. Distributed-star topology is composed of individual networks that are based upon the physical star topology connected together in a linear fashion - i.e., 'daisy-chained' - with no central or top level connection point (e.g., two or more 'stacked' hub/switch s, along with their associated star connected nodes).
Mesh Topology
In addition to the basic physical topologies discussed above, there is a mesh topology.
1-35. Which of the following is true about mesh topology? (Select all that apply)
A. Mesh topology is similar to star topology. B. It provides redundancy between machines in a star topology. C. A network can be fully meshed or partial meshed depending on the level of redundancy required. Figure 1-3 shows these types of physical topology. D. The mesh topology increases the overall network cost, but it improves network availability and reliability.
1-36. Which of the following is a type of the mesh topology? (Select all that apply)
A. fully meshed topology
B. partial meshed topology
C. star meshed topology
(Continues...)
Excerpted from The Complete One-Week Preparation for the CISCO CCENT/CCNA ICND1 Exam 640-822 by Thaar AL_Taiey Copyright © 2010 by Thaar AL_Taiey. Excerpted by permission.
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