Cisco Network Academy 중간점검

Cisco Network Academy 중간점검

Question 1:
Which type of routing protocol is RIP?
A. distance vector
B. link state
C. hybrid
D. spanning tree

Question 2:
When sending data to a host on a different network, the source host encapsulates data so that it contains what destination address in the IP header?
A. IP address of the router
B. MAC address of the router
C. MAC address of the destination device
D. IP address of the destination host

Question 3:
What kind of jack must be used for making a connection to a Category 5 unshielded twisted pair cable in a horizontal cabling scheme?
A. RJ-45
B. BNC
C. UTP 55
D. EIA 45

Question 4:
IP relies upon which OSI layer protocol to determine whether packets have been lost and request retransmission?
A. application
B. presentation
C. session
D. transport

Question 5:
In a connection-oriented system, what happens before any user data is transferred?
A. a connection is established with the recipient's local router
B. a connection is established between the sender and receiver
C. a connection is established with the sender's local router
D. the destination is not contacted before any actual data is sent

Question 6:
Which is a characteristic of a collision domain?
A. all computers on a single shared access media
B. all computers sharing a single IP address
C. all computers sharing a single MAC address
D. all computers within a WAN

Question 7:
Which correctly describes a source address?
A. the address of a host that receives data and information from other computers in a network
B. the address of a host that sends data and information to other computers in a network
C. data information that moves between computers in a network
D. it provides a connection between computers in a network

Question 8:
In electrical terms, what does AC mean?
A. alternating current
B. attenuating current
C. amplitude current
D. amplified current

Question 9:
What is the purpose of the safety ground in a computer?
A. connects the hot wire to the chassis
B. prevents metal parts from discharging hazardous voltage through the chassis
C. connects the neutral wire to the chassis
D. prevents metal parts from becoming energized with a hazardous voltage

Question 10:
What best describes the difference between alternating and direct current?
A. DC helps computers to work more efficiently, whereas AC can cause noise.
B. AC flows at a constant value, whereas DC rises and falls.
C. DC shifts ions from pole to pole, whereas AC ions run in one direction.
D. DC flows at a constant value, whereas AC rises and falls.

Question 11:
What should be used to mount cable to a wall?
A. tie wraps
B. electrical tape
C. staples
D. paperclips

Question 12:
Which simple protocol exchanges datagrams, without acknowledgements or guaranteed delivery?
A. TCP
B. ASP
C. TCP/IP
D. UDP

Question 13:
Which term refers to the amount of data that can be transmitted before receiving an acknowledgement?
A. window size
B. closed connection
C. two way handshake
D. expectational acknowledgement

Question 14:
When creating a network from just two PCs, what kind of cable would be used to directly connect them?
A. fiber optic cable
B. standard UTP cable
C. UTP rollover cable
D. UTP crossover cable

Question 15:
Which organization's LAN standards include 802.3 and 802.5?
A. EIA.
B. IEEE.
C. TIA.
D. UL.

Question 16:
Which describes Layer 3 path determination in the OSI model?
A. enables switches to find the best path to a host
B. enables a switch to choose the next hop
C. determines how a packet is forwarded on the same subnetwork
D. enables a router to choose the next hop

Question 17:
What type of server is used to translate a domain name into the associated IP address?
A. FTP
B. DNS
C. TFTP
D. DHCP

Question 18:
What is one advantage of using fiber optic cabling in networks?
A. cheap
B. easy to install
C. not susceptible to electromagnetic interference
D. it is available either with or without an outer shield

Question 19:
Which type of networking media is now installed most often for backbone cabling?
A. 100 ohm unshielded twisted pair cable
B. 150 ohm shielded twisted pair cable
C. 62.5/125 micron fiber-optic cable
D. 50 ohm coaxial cable

Question 20:
What is specified by the network number in an IP address?
A. the network to which the host belongs
B. the identity of the computer on the network
C. the node that is being addressed
D. the network broadcast identity of subnetwork

Question 21:
What do bridges and switches use to make data forwarding decisions?
A. logical addresses
B. physical addresses
C. network addresses
D. IP addresses

Question 22:
Which protocol can find the MAC address of a computer given its IP address?
A. RARP
B. DHCP
C. ARP
D. Proxy RARP

Question 23:
If Acme Inc. occupies the first three floors of a building and each floor is 1500 square meters, how many wiring closets should be installed according to EIA/TIA 569?
A. one
B. three
C. six
D. nine

Question 24:
How many pins are on each of the ports of a patch panel?
A. 4 pins
B. 8 pins
C. 11 pins
D. 45 pins

Question 25:
Which of the following best defines an object on a web page that, when clicked, transfers you to a new web page?
A. network redirector
B. hyperlink
C. web browser
D. ASCII

Question 26:
What is the unit of measure for resistance?
A. volt
B. ohm
C. amp
D. joule

Question 27:
If 4 hosts are connected to a hub how many IP addresses are required for these 5 devices?
A. one
B. two
C. four
D. five

Question 28:
What is the function of the session layer?
A. concerned with data structures and the negotiation of data transfer syntax
B. provides reliable transit of data across the physical layer
C. provides connectivity and path selection between two end systems
D. manages data exchange between presentation layer entities

Question 29:
What is the Organizational Unique Identifier (OUI)?
A. all hex digits of a MAC address
B. the 1st 6 hex digits of a MAC address
C. the last 6 hex digits of a MAC address
D. the prefix to all network device model numbers

Question 30:
Convert the decimal number 127 to Hex.
A. 2B
B. 7F
C. EF
D. 1A

Question 31:
What does the twisting of the wires do in a CAT-5 cable?
A. makes it thinner
B. makes it less expensive
C. limits signal degradation
D. allow 6 pairs to fit in the space of 4 pairs

Question 32:
Which fiber mode characteristic is recommended for inter-building connectivity?
A. single-mode
B. multi-mode
C. intra-mode
D. inter-mode

Question 33:
Which ports are reserved by TCP and UDP for public applications?
A. numbers from 255 to 1023
B. numbers below 255
C. numbers above 1023
D. numbers from 0 to 1023

Question 34:
What is a WAN?
A. A network that connects users across a large geographic area
B. A network that connects devices in a workgroup setting
C. A network that connects business departments in a building
D. A network that connects physically adjacent devices

Question 35:
Which statement best describes bridges and the way they make forwarding decisions?
A. they operate at OSI Layer 2 and use IP addresses to make decisions
B. they operate at OSI Layer 3 and use IP addresses to make decisions
C. they operate at OSI Layer 2 and use MAC addresses to make decisions
D. they operate at OSI Layer 3 and use MAC addresses to make decisions

Question 36:
What is the term to describe the maximum number of bits that can be transferred in a given amount of time?
A. impedance
B. propagation
C. attenuation
D. bandwidth

Question 37:
Which of the following best describes networking protocols?
A. a formal description of a set of rules and conventions that govern how devices on a network exchange information
B. the use of the same network topology for all networks
C. a set of guidelines that can be customized to meet individual needs
D. all of the above

Question 38:
Which term describes the conversion of binary data into a form that can travel on a physical communications link?
A. encoding
B. decoding
C. encrypting
D. decrypting

Question 39:
What device builds a MAC address table?
A. passive hub
B. bridge
C. active hub
D. transceiver

Question 40:
Why is a static route the preferred method for reaching stub networks?
A. static routing requires less overhead
B. static routing requires more overhead on the network
C. this allows routers to adjust to changes in the network
D. the routes are learned automatically

Question 41:
What is decimal number 164 in binary?
A. 10100100
B. 10010010
C. 11000100
D. 10101010

Question 42:
Which process does the OSI model describe?
A. how to protect networks from unwanted intrusions such as hackers and viruses
B. how a network uses transmission devices provided by common carriers to create a steady and reproducible signal
C. how information or data moves from one computer through a network to another computer
D. how to maintain physical and software links between networks

Question 43:
What is the primary cause of crosstalk?
A. cable wires that are too large in diameter
B. too much noise in a cable's data signal
C. electrical motors and lighting
D. electrical noise from other wires in a cable

Question 44:
At which layer of the OSI model is the NIC located?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5

Question 45:
Which of the following statements are true of routers?
A. They are passive.
B. They operate only at the data link layer.
C. They base forwarding decisions on Layer 2 addresses.
D. They base forwarding decisions on Layer 3 protocol addresses.

Question 46:
Which of the following is the approximate number of hosts supported in a Class B unsubnetted network?
A. 254
B. 2024
C. 65 thousand
D. 16 million

Question 47:
What is the decimal number 151 in binary?
A. 10010110
B. 10010111
C. 10101011
D. 10010011

Question 48:
What are most applications that work in a networked environment classified as?
A. file storage applications
B. network redirector applications
C. client-server applications
D. dialogue control applications

Question 49:
What is an example of an application that requires both a client and server component in order to function?
A. web browser
B. Microsoft Word
C. ASCII
D. PICT

Question 50:
Which of the following is a main function of the presentation layer?
A. dialogue control
B. managing applications
C. windowing
D. data compression

Question 51:
Which of the following would be the decimal value of the binary IP address 11001101.11111111.10101010.11001101?
A. 205.255.170.205
B. 109.255.170.109
C. 205.127.200.205
D. 109.127.200.109

Question 52:
Which best describes an extended star topology?
A. LAN topology in which each of the end nodes of the core topology are acting as the center of its own star topology
B. LAN topology in which transmissions from network stations propagate the length of a single coaxial cable and are received by all other stations
C. LAN topology in which end points on a network are connected to a common central switch by point-to-point links
D. LAN topology where central points on a network are connected to a common central switch by linear links

Question 53:
How many bits are in the network and subnet portion of a class B network with a subnet mask of 255.255.240.0?
A. 18
B. 19
C. 20
D. 21

Question 54:
What device addresses the problem of too much traffic on a network by dividing the network into segments and filtering traffic based on the MAC address?
A. bridge
B. port
C. hub
D. transceiver

Question 55:
What is the maximum number of bits that can be borrowed from the host portion of a Class C network to create subnets?
A. 2
B. 4
C. 6
D. 8

Question 56:
Which part of a network layer address does the router use during path determination?
A. the host address
B. the router address
C. the server address
D. the network address

Question 57:
Which factor reduces throughput?
A. increased number of users
B. decreased number of users
C. increased size of hard drive
D. decreased size of hard drive

Question 58:
Which protocol is designed to download or upload files on the Internet?
A. SNMP
B. Telnet
C. FTP
D. HTTP

Question 59:
What is ASCII and EBCDIC used to format?
A. graphics
B. text
C. digitized music
D. video

Question 60:
Which of the following is a source that can produce interference on UTP cable?
A. fluorescent lights
B. fiber-optic cabling
C. bridges
D. coaxial cabling.