CCNA 640-821 Test Database Console
Intro: Final Exam Preparation


CCNA 640-821 Test Database

Intro: Final Exam Preparation

Use the console buttons to scroll through the 75 questions.

1) Based on the topology schema - which four of the following statements are true of regarding the cables types required to nail-up the physical connections?

   Cable A - A rollover cable is used if one of the Desktop's Com Ports is directly attached to the router's console port.
   Cable B - A crossover cable is used if the Desktop's Ethernet NIC is directly attached to the Router's Ethernet port (Ethernet 0 for example).
   Cable C - A crossover cable is used if the Desktop's Ethernet NIC is directly attached to an available switch port (port 8 for example).
   Cable D - A straight-through cable is used to directly connect a Router's Fast Ethernet Interface (Ethernet 0) to Switch C's Fast Ethernet Interface.
   Cable E - A crossover cable is used to physically trunk Switch A to Switch B.
   Cable F - A crossover cable is used if the Desktop's Ethernet NIC is directly attached to a Hub port (port 7 for example).
2) Which two of the following interface states could a switch interface settle into after STP has completed building a spanning tree?

   Listening
   Blocking
   Forwarding
   Learning
3) Which of the following devices would be in the same collision domain as PC A below?

   PC B which is separated from PC A by an Ethernet hub
   PC C which is separated from PC A by a transparent bridge
   PC D which is separated from PC A by an Ethernet switch
   PC E which is separated from PC A by a router
4) Which two of the following applications use UDP protocol?

   Telnet
   SNMP
   SMTP
   SQL
   TFTP
5) New switches have been purchased for a network upgrade. The objective for the network design emphasizes an efficient and error-free transport instead of fast transport. Which one of the switching modes would you provision?

   cut-through
   fragment-free
   frame-filtering
   store-and-forward
   802.1q forwarding
   VTP transparent mode
6) In what LED mode does the switch use the per-port LEDs to show information about the current load on the switch?

   Duplex
   Util
   Speed
   Stat
7) Which three of the following would be considered true of HDLC?

   It supports error correction.
   It serves as Cisco's default on a serial link.
   It does not support error correction.
   It was introduced to support multiprotocol interoperatbility from its inception.
   HDLC framing defines a 1 byte address field even though it is not really needed over point-to-point links.
8) Refer to the exhibit. Which three of the following statements would be considered true of the configuration?

   The "clock rate 56000" command would be applied to Router A
   The "clock rate 56000" command would be applied to Router B
   There is no CSU/DSU within the configuration - therefore the "clock rate" command does not apply.
   The DCE Serial cable swaps transmit and receive.
   The DTE serial cable swaps transmit and receive
   This configuration is commonly known as a back-to-back serial connection.
9) Select the correct combination that will allow you to log in to a router locally using a terminal emulation program such as HyperTerminal or ProComm Plus.

   Connects the PC's Com port to the router's console port using a straight-through cable.
   Connect the PC's Com port to the router's console port using a rollover cable.
   Connect the PC's Com port to the router's Ethernet porting using a rollover cable.
   Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
   Connect the PC's Ethernet port to the router's Ethernet port using a straight-through cable.
10) Which one of the following is true of half-duplex Ethernet operation?

   With half-duplex transmission - frames feed into a single cable in one direction at a time.
   Half-duplex transmission between stations is achieved by using point-to-point Ethernet and Fast Ethernet connection.
   Half-duplex transmission between stations is achieved by using point-to-multi-point Ethernet and Fast Ethernet connection.
   Half-duplex Ethernet technology provides a transmit circuit connection wired directly to the receiver circuit at the other end of the connection.
11) Given the IP address 134.141.7.11 and the subnet mask 255.255.255.0 - what are the assignable IP host addresses in this subnet?

   134.141.7.0 to 134.141.7.252
   134.141.7.0 to 134.141.7.254
   134.141.7.1 to 134.141.7.254
   134.141.7.0 to 134.141.7.255
12) Which two of the following could cause a router to change the IOS that is loaded when the router boots?

   reload command
   boot exec command
   reboot exec command
   boot configuration command
   reboot configuration command
   configuration register
13) At which OSI Layer does data translation and code formatting take place?

   Application
   Presentation
   Session
   Transport
   Network
   Data-link
14) Which Transport Layer protocol header is detailed as follows: Source Port | Destination Port | Length | Checksum

   TCP
   IP
   UDP
   NFS
   DNS
15) Which layer of the OSI model permits access to media using a MAC address and is responsible for error detection and error recovery?

   Application
   Presentation
   Physical
   Data-link
   Transport
   Physical
16) What are two configuration modes in the Cisco 1900 and 2950 series switches' IOS?

   Global configuration
   Interface configuration
   Line configuration
   Auxiliary configuration
17) This term is the IEEE MAC sublayer standard while this term is the IEEE LLC (Logical Link Control) sublayer for IEEE Ethernet.

   802.3
   802.5
   ANSI X3T9.5
   802.2
18) Select two TCP/IP network interface layer protocols.

   PPP
   TCP
   SMTP
   UDP
   IP
   Ethernet
19) What type of domain is reduced in size by implementing switches on a Local Area Network segment?

   OSI domains
   Collision domains
   Broadcast domains
   Access domains
   NT domains
20) What are three effects of substantial sustained collisions within Ethernet CSMA/CD networks?

   increased broadcasts
   delay
   low throughput
   more throughput
   congestion
21) What type of router memory is used to store the operating system used for low-level debugging and not for normal operation?

   RAM
   ROM
   Flash
   NVRAM
   FFTP
22) A router reads each bit to determine the class of an address. Which three following binary numbers would the router recognize as class A addresses?

   00001010.10101100.11001100.00000111
    00011111.11110011.11111111.00111011
   01011101.11100001.11001100.11011011
   10000000.11111000.11000111.11110011
   00010111.11011011.11000001.11001100
23) Collisions do not occur during which operation.

   collision detection
   full-duplex
   half-duplex
   broadcast
24) Which of the following would be considered a "full mesh" topology?

   Two rings going through the same set of devices, allowing loops to be made upon failure which continues the operation of the ring.
   Each device has a direct connection to each other device.
   Each device does not have a direct connection to each other device.
   Each device is connected to a central point sometimes called a hub-and-spoke.
25) Which three of the following statements are generally true of the Core Layer of the Cisco Hierarchical Model?

   It is considered the backbone of the network.
   Its main role is to switch traffic as fast as possible.
   It should not perform filtering to slow down traffic.
   If should perform filtering to speed up traffic.
   It is considered the desktop layer
   It is considered the workgroup layer.
26) The "configure terminal" command is used to move from this mode to this mode?

   User mode
   Privilege mode
   Configuration mode
   Setup mode
27) Select term that is defined by the following: 'the type of protocol that is being forwarded when routers perform routing'?

   Routed Protocol
   Routing Protocol
   IOS
   RIP
   Route Protocol
28) A Layer 3 packet rests inside the data portion of an Ethernet frame, 1500 bytes is the largest IP packet allowed over this. This concept is commonly referred to as the ...?

   Ethernet
   Token Ring
   Minimum Transmission Unit
   Maximum Transmission Unit.
29) Which two of the following would define a connection-less network?

   Hand-shaking
   Virtual circuit
   Less bandwidth consumption
   Reliable
   Non-reliable
30) CSMA/CD is defined by the IEEE as:

   802.2
   802.3
   802.4
   802.5
31) Telnet, HTTP, FTP, WWW web browsers, NFS, SMTP, SNMP reside on which layer of the OSI model?

   Application
   Presentation
   Session
   Transport
   Network
   Data-link
32) You are asked to compare SONET to ATM. Which two of the following statements would be considered true.

   SONET defines Layer 2 details of passing traffic over optical cabling.
   ATM provides Layer 1 functionality including link specific addressing, frame and error detection
   SONET defines Layer 1 details of passing traffic over optical cabling.
   ATM provides Layer 2 functionality including link specific addressing, frame and error detection
33) Given the network address of 193.193.7.0 and the network broadcast address of 19.193.7.255 and the subnet mask 255.255.255.0, what are the assignable IP host addresses in the subnet?

   193.193.7.0 - 193.193.7.254
   193.193.7.1 - 193.193.7.254
   193.193.7.1 - 193.193.7.255
   193.193.7.0 - 193.193.7.255
34) Telnet and HTTP reside on which of the following layers of the OSI model.

   Transport
   Network
   Data-link
   Physical
   Presentation
   Application
35) What is the range of values of the first octet for Class A IP networks?

   0 to 127
   0 to 126
   1 to 127
   1 to 126
   128 to 191
   128 to 192
36) What is the benefit of segmenting a network with a router into two different segments called segment one and segment two?

   It increases the number of collisions.
   It decreases the number of broadcast domains.
   It connects segment one's broadcast to segment two.
   It prevents segment one's broadcast from getting to segment two.
37) Which of the following line subcommands tells the router not to interrupt the output of a show command with unsolicited messages?

   debug
   terminal monitor
   logging synchronous
   logging asynchronous
38) Which two of the following are true?

   Store and Forward switching works at wire-speed.
   Store and Forward switching creates variable latency through the switch.
   Fragment free switching has higher latency that Store and Forward switching.
   Cut through switching works at wire speed.
   Cut through switching creates variable latency through the switch.
39) Catalyst switches have three primary operating modes that are used to handle frame switching: cut-through, store-and-forward and fragment-free. Referring to the Exhibit - at which point is the store-and-forward switching decision made?

   1
   2
   3
   4
40) Which OSI model layer segments and reassembles data into a data stream?

   Application
   Presentation
   Session
   Transport
   Network
   Data-link
41) What is the purpose of Spanning-Tree Protocol in a switched Local Area Network?

   To provide a mechanism for network monitoring in switched environments.
   To prevent routing loops in networks with redundant switched paths.
   To manage, the addition, deletion, and naming of Virtual Local Area Networks across multiple switches.
   To prevent routing loops in networks with redundant paths.
   To segment a network into multiple collision domains.
42) Which of the following fully encapsulates the original Ethernet frame in a trunking header?

   VTP
   ISL
   802.1q
   Both ISL and 802.1q
   None of the above
43) Select three protocols are TCP/IP Model's Internetwork Layer.

   TCP
   ARP
   IP
   ICMP
   UDP
44) The OSI model consists of the following layers:

Layer 7 - Application
Layer 6 - Presentation
Layer 5 - Session
Layer 4 - Transport
Layer 3 - Network
Layer 2 - Data-link
Layer 1 - Physical

   True
   False
45) Which layer of the OSI model ensures reliable end-to-end delivery of data?

   Application
   Presentation
   Session
   Transport
   Network
   Data-link
46) Which of the following protocols are considered reliable?

   Frame Relay
   TCP
   IP
   UDP
   Ethernet
47) Select two reasons why you should use the command history?

   Reuse previously typed commands to save time
   Edit previously type commands if mistakes were made, especially on long configuration commands
   For training purpose
   To recall previous IOS version
   To recall help functions
48) Which of the following is associated with link-state routing protocols?

   poison reverse
   split horizon
   routing loops
   shortest path first calculations
49) Which two of the following PPP LCP features are used for authentication?

   LQM
   Magic Number
   PAP
   RAP
   CHAP
   LMQ
50) You are trouble-shooting a problem between Router A and Router B from RouterA. Which command will successfully ping the IP address of RouterB?

   RouterA>ping 131.5.5.0
   RouterA#ping 131.5.5.30
   RouterA>ping 131.5.5.256
   RouterA>ping 131.5.5.256
51) Which of the following provides for guaranteed delivery over a network by using acknowledgements.

   UDP
   IP
   TCP
   HTTP
   SMTP
   FTP
52) Which three of the following are considered features of a protocol that matches the OSI model's Transport layer?

   Conversion from binary to ASCII
   Error recovery
   Flow control
   Segmenting of application data
   Reliabilty
53) Which statement is true regarding Frame Relay Virtual Circuits?

   Each Virtual Circuit requires a separate access link.
   Multiple Virtual Circuits can share the same access link.
   All Virtual Circuits sharing the same access link must connect to the same router on the other side of the Virtual Circuit.
   All Virtual Circuits on the same access link must use the same DLCI.
54) You log into a router locally to perform local administration/management functions. Which port will you access to do this?

   console port
   auxiliary port
   ethernet port
   bnc port
   switch port
   hub port
55) A router stores routing tables, ARP cache, and packet buffers in:

   ROM
   RAM
   NVRAM
   Flash
   ROMMON
   Bootflash
56) Which three of the following protocols are used by DSL modems and routers for data-link layer functions?

   PPP
   IEEE 802.3
   ATM
   IEEE 802.1Q
   MCNS MAC
57) Please review the Exhibit. How many broadcast domains and collision domains make up the following network topology?

   2 Broadcast Domains, 9 Collision Domains
   9 Broadcast Domains, 2 Collision Domains
   7 Broadcast Domains, 3 Collision Domains
   3 Broadcast Domains, 7 Collision Domains
   4 Broadcast Domains, 11 Collision Domains
   11 Broadcast Domains, 4 Collision Domains
58) This is an undesirable event in which many broadcasts are sent simultaneously across the entire network.

   Collision Storm
   Broadcast Blast
   Broadcast Collisions
   Broadcast Packets
   Broadcast storm
59) TCP is a connection-oriented protocol. An advantage of operating in a connection-oriented environment is that a connection is established between both ends before the transfer of information can begin. What is a disadvantage of using a connection-oriented protocol such as TCP?

   Packet acknowledgement may add overhead.
   Packets are not tagged with sequence numbers.
   Loss or duplication of data packets is more likely to occur.
   The application layer must assume responsibility for correct sequencing of the data packets.
60) Which one of the following is not a characteristic of a network segment on a transparent switch?

   The segment has its own collision domain.
   The segment can translate from one media to a different media.
   All devices in the segment are part of the same broadcast domain.
   One device per segment can currently send frame to the switch.
61) Which of the following is used to specifically identify the entity that is created when encapsulating data inside data-link headers and trailers.

   Packet
   Frame
   Data
   Chunk
   Segment
62) Select four true statements regarding a Layer 3 switching device.

   It is a cross between a router and a switch.
   Each port on the switch is a separate Local Area Network port.
   It cannot store-and-forward packets based on Layer 3 information.
   It can store-and-forward packets based on Layer 3 information
   It performs software-based routing.
   It performs hardware-based routing.
63) Which of the following would be considered an "extended star" topology?

   Two rings going through the same set of devices, allowing loops to be made upon failure which continues the operation of the ring.
   Each device is connected to a central point sometimes called hub-and-spoke.
   A star topology is in the center, but instead of each point being a single device, it can be the center of another star topology.
   Each device has a direct connection to each other device.
64) What type of switch memory is used to store the configuration used by the switch when the switch first comes up?

   RAM
   ROM
   Flash
   NVRAM
   Bubble
65) Given the MAC address: CF-7B--0A-02-BD-2C. Which of the following options expresses the OUI component of the MAC address in binary format?

   11001100 - 11111011 - 01010101
   11110001 - 10101011 - 10000001
   11001111 - 01111011 - 00001010
   10111111 - 01111011 - 00001101
66) Which three of the following would apply to features of an ISDN PRI in US?

   23 Bearer Channels + 1 D Channel
   23 Data Channels + 1 Bearer Channel
   23 Bearer Channels @ 64 kbps
   1 Data Channel @ 16 kbps
   31 Bearer Channels
   1 Data Channel @ 64 kbps.
67) Wireless LAN specification 802.11a transmits at up to how many Mbps using the 5 GHz frequency band

   52
   54
   56
   60
68) Which of the following connections can be used to Telnet from a user’s Desktop PC directly to a router?

   Connect the Com port of the Desktop PC to the console port of the router using a crossover cable.
   Connect the Com port of the Desktop PC to the Ethernet port of the router using a straight-through cable.
   Connect the Ethernet port of the Desktop PC to the Ethernet port of the router using a straight-through cable.
   Connect the Ethernet port of the Desktop PC to the Ethernet port of the router using a rollover cable.
   Connect the Ethernet port of the Desktop PC to the Ethernet port of the router using a crossover cable.
   Connect the Com port of the Desktop PC to the console port of the router using a straight-through cable.
69) Which OSI model layer manages device addressing, tracks the location of devices on the network and determines the best way to move data?

   Application
   Presentation
   Session
   Transport
   Network
   Data-link
70) Select three benefits of using layering to a solve complex problem?

   Reduces a complicated problem to simpler steps.
   Builds flexiblity.
   Speeds up deployment.
   Allows for modularity.
   Standardizes.
71) What option correctly details the five conversion steps of data encapsulation?

   Data; segments; packets; frames; bits.
   Bits; frames; packets; segments; data.
   Packets; segments; data; bits; frames.
   Segments; packets; frames; bits; data.
72) A unicast Ethernet Local Area Network address could be considered which five of the following?

   BIA (burned-in address)
   UAA (universally administered address)
   MAC address
   Ethernet address
   Physical address
   Logical address
73) TCP, UDP, SPX reside on which layer of the OSI model.

   Transport
   Network
   Data-link
   Physical
   Presentation
   Application
74) Which of the following would be considered a "bus" topology?

   Each device is connected to two others so that the signal is repeated in one direction, causing a ring or loop.
   Each device is connected to a central point sometimes called hub-and-spoke.
   This is a linear topology with all devices to connected to the cable.
   Each device has a direct connection to each other device.
75) Within the IOS editing mode, how do you return to the beginning of the command line?

   Control A
   Escape B
   Control B
   Escape A
   Right arrow
   Left arrow

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