Test your basic knowledge |

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. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
100 meters
Hosts use a logical bus topology
All switch and bridge ports are in either the forwarding or blocking state.

2. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Duplex mismatch
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
To prevent switching loops in networks with redundant switched paths.

3. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Transport
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.
Serial0/1 is down - line protocol is down
A broadcast address will never be the source address of a frame

4. What are two characteristics of 'store and forward' switching?
Configure the switch so that it has lower priority than other switches in the network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Transport
MAC Address and Bridge Priority

5. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Switches increase the number of collision domains in the network.
Transport
HTTPS - SMTP - and TFTP

6. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
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
CertK Switch(config)# ip default-gateway 192.168.1.115
802.3ab and 802.3z
Path selections and Packet switching.

7. 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?
VTP will allow switches to share VLAN configuration information
Show arp and Show interface
802.3ab and 802.3z
Increased latency and Filtering of all frame errors

8. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this 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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.

9. 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?
Switches increase the number of collision domains in the network.
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.
To allow remote management of the switch.
VLAN and Swtich

10. 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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11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
The system is malfunctioning.
Layer 4
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

12. Which of the following services use TCP?
The port is experiencing errors
SMTP FTP and HTTP
The Bridgeg ID and The bridge priority
Source Port - Acknowledgment Number - and Window

13. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
MAC Address and Bridge Priority
The interfaces must be configured for NAT.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Application

14. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
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.
Sequence number - Window size - and Acknowledgment number
The switch will forward the frame to a specific port

15. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It operates without collisions and It provides faster data transfer
All switch and bridge ports are in either the forwarding or blocking state.

16. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
VTP
The system is malfunctioning.
802.3ab and 802.3z

17. Which protocol uses TCP port 443 at layer 4?
Certkiller B > trace
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Auto - Desirable - and On
HTTPS

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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Duplex mismatch
100 meters
A hub and A repeater.

19. 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?
Layer 4
The port is experiencing errors
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Fiber optic cable.

20. 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?
Auto - On - and Desirable
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.
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.
Physical Layer and Datalink Layer

21. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
100 meters
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.
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.
Switches increase the number of collision domains in the network.

22. 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?
Sequence number - Window size - and Acknowledgment number
Show cdp neighbor detail
An additional broadcast domain will be created.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

23. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It is used to prevent switching loops in networks with redundant switched routes.
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace

24. 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?
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.
TCP
Switches increase the number of collision domains in the network.
The network layer

25. Which two of the following values does STP take into consideration when it elects the root bridge?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
This is an Ethernet port operating at half duplex
Telnet and FTP
The Bridgeg ID and The bridge priority

26. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Transport
The interfaces must be configured for NAT.
TCP

27. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Auto - Desirable - and On
It is the sum of the costs based on bandwidth
It operates without collisions and It provides faster data transfer
Show arp and Show interface

28. Which three of the protocols below belong to the application layer? (Select three answer choices)
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
Layer 3
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
HTTPS - SMTP - and TFTP

29. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
A cross-over cable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The Bridgeg ID and The bridge priority
Auto - Desirable - and On

30. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Port security
Information about a route should never be sent back in the direction from which the original update came.
The interfaces must be configured for NAT.
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.

31. 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?
The port is experiencing errors
VTP
Increased latency and Filtering of all frame errors
Show cdp neighbor detail

32. Which of the following correctly describe steps in the OSI date encapsulation process?
Network
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.
The port is experiencing errors
Encapsulations PPP and authentication CHAP

33. 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?
VLAN and Swtich
Switches - Bridges - and Routers
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

34. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
All switch and bridge ports are in either the forwarding or blocking state.
Encapsulations PPP and authentication CHAP
Switches - Bridges - and Routers
Source Port - Acknowledgment Number - and Window

35. 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?
Layer 4
Decrease the window size.
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has a lower priority than other switches in the network.

36. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Auto - On - and Desirable
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.
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
The interfaces must be configured for NAT.

37. 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.
Path selections and Packet switching.
Application
Switches - Bridges - and Routers
802.1Q and ISL

38. What is the IEEE standard associated with Gigabit Ethernet?
The port is experiencing errors
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
802.3ab and 802.3z

39. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
Source Port - Acknowledgment Number - and Window
An electrical pulse indicates that the collision has cleared.

40. Which fields are included in the TCP header?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Source Port - Acknowledgment Number - and Window
It operates without collisions and It provides faster data transfer
Decrease the window size.

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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The sequence number in the TCP header.
Sequence number - Window size - and Acknowledgment number

42. 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?
Sequence number - Window size - and Acknowledgment number
A hub and A repeater.
It is used to prevent switching loops in networks with redundant switched routes.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

43. Which of the following are true of Ethernet technology?
Learning - Listening - and Forwarding
It is used to prevent switching loops in networks with redundant switched routes.
To prevent switching loops in networks with redundant switched paths.
Hosts use a logical bus topology

44. 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?
100 meters
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The network layer
Increased latency and Filtering of all frame errors

45. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Device Identifiers - Capabilities list - Platform
In an improperly implemented redundant topology
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
Information about a route should never be sent back in the direction from which the original update came.

46. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
It operates without collisions and It provides faster data transfer
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
To prevent switching loops in networks with redundant switched paths.
Network

47. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Duplex mismatch
Sequence number - Window size - and Acknowledgment number

48. 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?
Show cdp neighbor detail
Switches increase the number of collision domains in the network.
To allow remote management of the switch.
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.

49. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The interfaces must be configured for NAT.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

50. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Congestion avoidance - Windowing and Buffering
Show arp and Show interface
Port security