Saturday, April 22, 2017

Questions Network + - Chapter 1

Identifying Characteristics of a network

 1. Which of the following is an example of a network?
 A. A computer attached to a printer and a scanner to input and output information
 B. Computer systems sharing a common communication medium for the purpose of sharing
information or devices
 C. Several printers connected to a switch box going to a single terminal
 D. Several diskettes holding information for one workstation
 2. In which type of network is there no dedicated server, with each node on the network being an
equal resource for sharing and receiving information?
 A. Client/server
 B. Peer-to-peer
 C. Windows Server 2003
 D. Novell NetWare 6.x
 3. What is the Microsoft term for a peer-to-peer network?
 A. Client/server
 B. Domain
 C. Workgroup
 D. Active Directory
 4. A company has offices in Halifax and Toronto. Both networks are connected to allow the two
locations to communicate. This is considered what type of network?
 A. LAN
 B. JAN
 C. MAN
 D. WAN
5. Which type of server is responsible for storing files for users on the network?
 A. File and print server
 B. Web server
 C. Directory server
 D. Application server
 6. You wish to extend your intranet to certain business partners. What type of network are you
building?
 A. Intranet
 B. Internet
 C. Extranet
 D. LAN
identifying network topologies
 7. The physical layout of computers, cables, and other components on a network is known as
which of the following?
 A. Segment
 B. Backbone
 C. Topology
 D. Protocol
 8. Which topology has a centralized location in which all of the cables come together to a central
point such that a failure at this point brings down the entire network?
 A. Bus
 B. Star
 C. Mesh
 D. Ring
 e. Wireless
 9. Which topology has a layout in which every workstation or peripheral has a direct connection
to every other workstation or peripheral on the network?
 A. Bus
 B. Star
 C. Mesh
 D. Ring
 e. Wireless
 10. Which network topology requires the use of terminators?
 A. Bus
 B. Star
 C. Mesh
 D. Ring
 e. Wireless
networking Media and Connectors
 11. Which of the following is not a common type of medium used in networking?
 A. Coaxial cable
 B. Twisted-pair cable
 C. Fiber-optic cable
 D. RJ-45
 12. What is the distance limitation of 10Base2, or thinnet?
 A. 100 meters
 B. 185 meters
 C. 250 meters
 D. 500 meters
 13. Which cable type sends the signal as pulses of light through a glass core?
 A. Thinnet
 B. Thicknet
 C. Fiber optic
 D. CAT 5e
 14. What is the maximum distance of CAT 3 UTP cabling?
 A. 100 meters
 B. 185 meters
 C. 250 meters
 D. 500 meters
 15. What is the maximum distance of cabling used on a 10Base5 network?
 A. 100 meters
 B. 185 meters
 C. 250 meters
 D. 500 meters
 16. You wish to install a 100BaseT network. What type of cabling will you use?
 A. CAT 3 UTP
 B. CAT 5 UTP
 C. Thinnet
 D. Fiber optic
 17. Fiber-optic cabling uses which types of connectors? (Select two.)
 A. SC
 B. RJ-45
 C. BNC
 D. ST
 18. What is the maximum distance of single-mode fiber (SMF)?
 A. 300 meters
 B. 500 meters
 C. 2 km
 D. 850 meters
 19. Which cable type is immune to outside interference and crosstalk?
 A. Thinnet
 B. Thicknet
 C. Twisted-pair
 D. Fiber optic
 20. Which type of connector is used on 10Base2 networks?
 A. SC
 B. BNC
 C. RJ-45
 D. RJ-11
 21. You want to create a crossover cable to connect two systems directly together. Which wires
would you have to switch at one end of the cable?
 A. Wires 1 and 2 with wires 3 and 6
 B. Wires 2 and 3 with wires 6 and 8
 C. Wires 1 and 2 with wires 3 and 4
 D. Wires 2 and 3 with wires 3 and 6
access Methods
 22. Which access method does 100BaseT use?
 A. Baseband
 B. CSMA/CD
 C. CSMA/CA
 D. Token passing
 23. Which access method does Token Ring use?
 A. Baseband
 B. CSMA/CD
 C. CSMA/CA
 D. Token passing
network architectures
 24. Which network architecture is defined as the IEEE 802.3 standard?
 A. Token Ring
 B. FDDI
 C. Fiber
 D. Ethernet
 25. Which network architecture uses single-mode fiber-optic cabling?
 A. 1000BaseLX
 B. 1000BaseSX
 C. 1000BaseCX
 D. 1000BaseTX
 26. How many populated network segments can exist with 10Base2?
 A. 1
 B. 2
 C. 3
 D. 5
 27. Which type of cabling is used in a 10BaseFL network?
 A. STP
 B. CAT 3 UTP
 C. Thinnet
 D. Thicknet
 e. Fiber optic
 28. Which Gigabit architecture uses multimode fiber cabling?
 A. 1000BaseLX
 B. 1000BaseSX
 C. 1000BaseCX
 D. 1000BaseTX
network operating systems
 29. Which network operating system was developed from the VMS platform?
 A. NetWare
 B. UNIX
 C. Windows 95
 D. Windows NT
 30. Which operating system was originally developed by Bell Labs and has multitasking, multiuser,
and built-in networking capabilities?
 A. UNIX
 B. Windows NT
 C. Windows 95
 D. NetWare
 31. Which of the following are network operating systems and not simply desktop operating
systems? (Choose all that apply.)
 A. Novell NetWare
 B. Microsoft Windows 98
 C. Microsoft Windows XP
 D. Microsoft Windows Server 2003
 32. Novell’s directory service is called ______________?
 A. Active Directory
 B. NDS / eDirectory
 C. DNS
 D. StreetTalk
 33. Microsoft’s directory service is called ______________?
 A. Active Directory
 B. NDS
 C. DNS
 D. StreetTalk



seLf test ansWers
identifying Characteristics of a network
 1. þ B. Computer systems sharing a common communication medium for the purpose of sharing
information or devices is what a network is all about. The entities are usually workstations, and
the medium is either a cable segment or a wireless medium such as an infrared signal.
ý A, C, and D are incorrect because a network, by definition, is two or more computers
connected to share information. These three choices do not allow two or more PCs to
share information; they are only setups of several connected devices or a PC connected to a
peripheral device.
 2. þ B. A peer-to-peer network has no dedicated servers. There are no hierarchical differences
between the workstations in the network; each workstation can decide which resources are
shared on the network. In a peer-to-peer network, all workstations are clients and servers at the
same time.
ý A is incorrect because this network type has a dedicated server. C and D are incorrect
because a Windows Server 2003 and Novell NetWare 6.x constitute the server portion of the
client/server network.
 3. þ C. The Microsoft term for a peer-to-peer network is a workgroup environment. If you
have not installed your Windows clients in a domain (client/server), then they are sitting in a
workgroup environment.
ý A is incorrect because a client/server network is the opposite of a peer-to-peer network;
a client/server network uses a central server. B is incorrect because domain is the term for a
Microsoft server-based environment. D is incorrect because Active Directory is the term for
Microsoft’s implementation of a directory server.
 4. þ D. Two remote offices that are spread over geographic distances constitute a wide area
network (WAN).
ý A is incorrect because it is the opposite of a WAN; a LAN is a network in a single
geographic location. B is incorrect because there is no such thing in networking as a JAN. C is
a metropolitan area network.
 5. þ A is correct. A file and print server is responsible for providing files and printers to users on
the network.
ý B, C, and D are incorrect because they are each their own type of server. A web server will
host web sites; a directory server is a server that contains a central list of objects, such as user
accounts on the network; and an application server runs a form of networking application, such
as an e-mail or a database server program.


 6. þ C. An extranet allows selected individuals to see your corporate intranet.
ý A, B, and D are incorrect. An intranet allows only individuals within your company to
access the site; allowing anyone on the Internet to access it would make it an Internet-type
application.
identifying network topologies
 7. þ C. The topology is the physical layout of computers, cables, and other components on a
network. Many networks are a combination of the various topologies.
ý A is incorrect because a segment is a part of a LAN that is separated by routers or bridges
from the rest of the LAN. B is incorrect because a backbone is the main part of cabling that
joins all of the segments together and handles the bulk of the network traffic. D is incorrect
because a protocol is a set of rules governing the communication between PCs; a protocol can
be thought of as similar to a language.
 8. þ B. In a star topology, all computers are connected through one central hub or switch. A
star topology actually comes from the days of the mainframe system. The mainframe system had
a centralized point at which the terminals connected.
ý A is incorrect because a bus topology uses one cable to connect multiple computers. C
is incorrect because the mesh network has every PC connected to every other PC and can
resemble a spider’s web. D is incorrect because a ring topology resembles a circle or ring. E is
incorrect because there is no physical cabling to represent the topology; it is represented by a
bubble or cell.
 9. þ C. A mesh topology is not very common in computer networking, but you have to know
it for the exam. The mesh topology is seen more commonly with something like the national
telephone network. With a mesh topology, every workstation has a connection to every other
component of the network.
ý A is incorrect because a bus topology uses one cable to connect multiple computers.
B is incorrect because a star topology is made up of a central point or hub with cables coming
from the hub and extending to the PCs. D is incorrect because this topology resembles a
circle or ring. E is incorrect because there is no physical cabling to represent the topology; it is
represented by a bubble or cell.
 10. þ A. A bus topology uses terminators on any loose end of the bus. The terminator is designed
to absorb the signal so that it does not bounce back on the wire and collide with other data.
ý B is incorrect because a star topology does not use terminators; it uses a central hub or
switch that connects systems to the network. C is incorrect because a mesh topology has
each system connecting to each other system. D is incorrect because a ring topology has no
beginning and no end, so there are no “loose ends” to put a terminator on. E is incorrect
because a wireless network does not use cables at all.

networking Media and Connectors
 11. þ D. RJ-45 is not a network medium. Three primary types of physical media can be used:
coaxial cable, twisted-pair cable, and fiber-optic cable. Transmission rates that can be supported
on each of these physical media are measured in millions of bits per second (Mbps). RJ-45 is a
connector type for twisted-pair cabling.
ý A, B, and C are incorrect because they are all common network media.
 12. þ B. 10Base2 (thinnet) has a distance limitation of 185 meters. 10Base5 (thicknet) has
a distance limitation of 500 meters, and 10BaseT (twisted-pair) has a distance limitation of
100 meters.
ý A, C, and D are incorrect because these are not the distances covered by thinnet.
 13. þ C. Fiber-optic cabling sends pulses of light through a glass core.
ý A, B, and D are incorrect because each carry an electrical signal.
 14. þ A. All twisted-pair cabling is limited to 100 meters.
ý B is incorrect because 185 meters is the maximum distance of thinnet cabling; D is
incorrect because 500 meters is the maximum distance of thicknet cabling. C is incorrect; there
is no cable type that has a 250-meter maximum distance.
 15. þ D. 500 meters is the maximum distance of thicknet cabling.
ý A is incorrect because all twisted-pair cabling is limited to 100 meters. B is incorrect
because 185 meters is the maximum distance of thinnet cabling. C is incorrect because there is
no cable type that has a 250-meter maximum distance.
 16. þ B. 100BaseT uses twisted-pair that runs at 100 Mbps. CAT 5 is twisted-pair cabling type
that runs at 100 Mbps.
ý A is incorrect because CAT 3 runs at 10 Mbps. C is incorrect because thinnet runs at
10 Mbps and is known as 10Base2. D is incorrect. Although fiber optic can run at 100 Mbps, it
is not used in 100BaseT.
 17. þ A and D. Fiber-optic cabling uses a number of connector styles—two of which are the SC
and ST connectors.
ý B and C are incorrect. RJ-45 is used by twisted-pair cabling, and BNC is used by thinnet.
 18. þ C. Single-mode fiber-optic cabling has a maximum distance of approximately 2 km.
ý A, B, and D are incorrect distances for single-mode fiber, although 300 meters is the
maximum distance of multimode fiber.
 19. þ D. Fiber-optic cabling is immune to outside interference and crosstalk.
ý A, B, and C are incorrect. Thinnet, thicknet, and twisted-pair cabling are susceptible to
outside interference.

 20. þ B. The BNC connector is the connector used by 10Base2.
ý A, C, and D are incorrect. The SC connector is used by fiber optic, the RJ-45 connector is
used by twisted-pair, and the RJ-11 connector is used by the telephone cable.
 21. þ A. To create a crossover cable, you would switch wire 1 and 2 with wire 3 and 6 on one end
of the cable.
ý B, C, and D are incorrect. These combinations are not used to create crossover cables.
access Methods
 22. þ B. Carrier-sense multiple access with collision detection (CSMA/CD) is the access method
that 100BaseT uses. With CSMA/CD, a host will sense the wire to see if it is free; only if the
wire is free of data will the host send data on the wire.
ý A, C, and D are incorrect. Baseband is not an access method. CSMA/CA and token
passing are access methods but are not used by 100BaseT.
 23. þ D. Token Ring uses the token-passing access method. With token passing, a host must
have the token before submitting data on the wire.
ý A, B, and C are incorrect. Baseband is not an access method, CSMA/CA is used in
AppleTalk networks, and CSMA/CD is used in Ethernet environments.
network architectures
 24. þ D. Ethernet (CSMA/CD) is defined by IEEE 802.3
ý A, B, and C are incorrect. These architectures are not defined by 802.3, but be aware that
Token Ring is defined by IEEE 802.5.
 25. þ A. 1000BaseLX uses single-mode fiber-optic cabling.
ý B, C, and D are incorrect. 1000BaseSX uses multimode fiber-optic cabling, 1000BaseCX
uses coaxial cabling, and 1000BaseTX uses CAT 5e or above.
 26. þ C. Following the 5-4-3 rule, you are allowed to have five network segments, joined by four
repeaters, while three of those segments are populated with nodes.
ý A, B, and D are all incorrect because they are not the number of populated segments in a
10Base2 network.
 27. þ E. 10BaseFL uses fiber-optic cabling. Remember to watch the characters at the end of the
architecture name to determine what the cable type is—“FL” is for fiber link.
ý A, B, C, and D are incorrect. STP, thinnet, thicknet, and CAT 3 UTP are all cable types
but are not used in 10BaseFL.

 28. þ B. 1000BaseSX uses multimode fiber cabling. Remember that multimode cannot go as far
as single mode, and also the “SX” in the architecture is for “short range”—multimode for short
range, single mode for long range.
ý A, C, and D are all incorrect. 1000BaseLX uses single-mode fiber, 1000BaseCX uses
coaxial cable, and 1000BaseTX uses twisted-pair.
network operating systems
 29. þ D. Developed from the VMS platform many years ago, Microsoft Windows NT has grown
into a very popular network operating system with a new and different interface.
ý A, B, and C are incorrect. The graphical interface and look and feel of the other operating
systems in the Windows family made Windows NT very popular among users and network
administrators. Windows 95 was simply a great enhancement of Windows for Workgroups.
NetWare and UNIX were not based on VMS.
 30. þ A. Originally developed at Bell Labs, UNIX is a very popular operating system for powerful
networking and database management. UNIX boasts three key features that make it powerful:
multitasking, multiuser, and networking capabilities.
ý B, C, and D are incorrect. Windows 95 and NT were developed by Microsoft; NetWare
was developed by Novell.
 31. þ A and D. Novell NetWare and Microsoft Windows Server 2003 are NOSs. The major
difference between Windows servers and NetWare is at the server.
ý B and C are incorrect. Windows 98 and Windows XP are client operating systems and not
true servers.
 32. þ B. Novell’s directory service is known as NDS or eDirectory.
ý A, C, and D are incorrect. Active Directory is the name of Microsoft’s directory service,
DNS is the name of a service that performs FQDN–to–IP address name resolution, and
StreetTalk is Banyan’s directory service.
 33. þ A. Active Directory is the name of Microsoft’s directory service.
ý B, C, and D are incorrect. Novell’s directory service is known as NDS, DNS is the name
of a service that performs FQDN–to–IP address name resolution, and StreetTalk is Banyan’s
directory service.

Mostrar Shadow DOM (Document Object Model)

Quando você está lidando com situações como botões e entradas, o navegador geralmente constrói atributos ocultos. Para ver isso, cliqu...