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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
HTTPS
A broadcast address will never be the source address of a frame
Certkiller B > trace

2. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The system is malfunctioning.
Network
Show cdp neighbor detail

3. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Switches increase the number of collision domains in the network.
Packet switching - Packet filtering and Internetwork communication.
Show cdp neighbor detail
The Bridgeg ID and The bridge priority

4. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
The port is experiencing errors
Serial0/1 is down - line protocol is down
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application

5. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
The Bridgeg ID and The bridge priority
This is an Ethernet port operating at half duplex
MAC Address and Bridge Priority

6. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
The port is experiencing errors
Sequence number - Window size - and Acknowledgment number
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.

7. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Physical Layer and Datalink Layer
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
It is used to prevent switching loops in networks with redundant switched routes.

8. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Decrease the window size.
Increased latency and Filtering of all frame errors
Encapsulations PPP and authentication CHAP
Auto - Desirable - and On

9. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
It will prevent segment 1's broadcasts from getting to segment 2.
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Increased latency and Filtering of all frame errors
CertK Switch(config)# ip default-gateway 192.168.1.115

10. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Hosts use a logical bus topology
TCP
A cross-over cable
VTP

11. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Port security
Serial0/1 is down - line protocol is down
CertK Switch(config)# ip default-gateway 192.168.1.115
Encapsulations PPP and authentication CHAP

12. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
The system is malfunctioning.
Switches - Bridges - and Routers
Configure the switch so that it has lower priority than other switches in the network
802.1Q and ISL

13. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
An additional broadcast domain will be created.
Source Port - Acknowledgment Number - and Window
STP
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

14. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
A cross-over cable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority

15. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
Physical Layer and Datalink Layer
Application
The network layer
It is used to prevent switching loops in networks with redundant switched routes.

16. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
VTP
100 meters
In an improperly implemented redundant topology
The network layer

17. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
All switch and bridge ports are in either the forwarding or blocking state.
100 meters
Auto - On - and Desirable

18. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
Duplex mismatch
The network layer
The system is malfunctioning.
802.3ab and 802.3z

19. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
STP
MAC Address and Bridge Priority
Decrease the window size.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.

20. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Data link
ARP and ICMP
The Bridgeg ID and The bridge priority

21. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
In an improperly implemented redundant topology
The system is malfunctioning.
This is an Ethernet port operating at half duplex

22. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Congestion avoidance - Windowing and Buffering
VLAN and Swtich
802.3ab and 802.3z

23. Why is full-duplex Ethernet superior to its single-duplex counterpart?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
To prevent switching loops in networks with redundant switched paths.
It operates without collisions and It provides faster data transfer

24. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Encapsulations PPP and authentication CHAP
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
VTP will allow switches to share VLAN configuration information
HTTPS

25. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
Decrease the window size.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
An electrical pulse indicates that the collision has cleared.

26. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
Application
To allow remote management of the switch.
Telnet and FTP
The system is malfunctioning.

27. Which two of the following values does STP take into consideration when it elects the root bridge?
Fiber optic cable.
The system is malfunctioning.
Switches - Bridges - and Routers
The Bridgeg ID and The bridge priority

28. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Certkiller B > trace

29. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Duplex mismatch
Physical Layer and Datalink Layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

30. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
ARP and ICMP
The port is experiencing errors
Data link
Path selections and Packet switching.

31. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
To allow remote management of the switch.
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
A hub and A repeater.
Information about a route should never be sent back in the direction from which the original update came.

32. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Telnet and FTP
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
A hub and A repeater.
Increased latency and Filtering of all frame errors

33. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Decrease the window size.
Data link
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

34. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Show cdp neighbor detail
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 3
100 meters

35. Which of the protocols below use TCP at the transport layer?
The sequence number in the TCP header.
A hub and A repeater.
It is used to prevent switching loops in networks with redundant switched routes.
SMTP - FTP - HTTP - and HTTPS

36. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Decrease the window size.
Switches increase the number of collision domains in the network.
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to

37. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
802.3ab and 802.3z
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
VLAN and Swtich
The system is malfunctioning.

38. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.
Configure the switch so that it has a lower priority than other switches in the network.
ARP and ICMP

39. Which of the following are spanning tree port states?
The network layer
Switches - Bridges - and Routers
Learning - Listening - and Forwarding
Show cdp neighbor detail

40. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
HTTPS
This is an Ethernet port operating at half duplex
Congestion avoidance - Windowing and Buffering

41. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Configure the switch so that it has a lower priority than other switches in the network.
Encapsulations PPP and authentication CHAP
Fiber optic cable.
Learning - Listening - and Forwarding

42. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Sequence number - Window size - and Acknowledgment number
An electrical pulse indicates that the collision has cleared.
Physical Layer and Datalink Layer
A hub and A repeater.

43. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Configure the switch so that it has lower priority than other switches in the network

44. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
Buffering - Cut-through - and Congestion avoidance
VTP

45. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Decrease the window size.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
To allow remote management of the switch.
Duplex mismatch

46. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Auto - On - and Desirable
100 meters
802.3ab and 802.3z

47. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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48. Which three of the protocols below belong to the application layer? (Select three answer choices)
Network
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Show arp and Show interface
HTTPS - SMTP - and TFTP

49. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
STP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network
802.1Q and ISL

50. By default - which of the following factors determines the spanning-tree path cost?
Certkiller B > trace
It is the sum of the costs based on bandwidth
SMTP FTP and HTTP
It will prevent segment 1's broadcasts from getting to segment 2.