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. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
Layer 4
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Information about a route should never be sent back in the direction from which the original update came.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

2. 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?
Layer 4
Physical Layer and Datalink Layer
Fiber optic cable.
An electrical pulse indicates that the collision has cleared.

3. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Switches - Bridges - and Routers
An electrical pulse indicates that the collision has cleared.
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.
Path selections and Packet switching.

4. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Increased latency and Filtering of all frame errors
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

5. Which three of the protocols below belong to the application layer? (Select three answer choices)
Layer 4
HTTPS - SMTP - and TFTP
A cross-over cable
Decrease the window size.

6. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Learning - Listening - and Forwarding
Telnet and FTP
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.
STP

7. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
The network layer
HTTPS
The sequence number in the TCP header.
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.

8. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Data link
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches - Bridges - and Routers
It is the sum of the costs based on bandwidth

9. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Decrease the window size.
Hosts use a logical bus topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4

10. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Auto - Desirable - and On
Show arp and Show interface

11. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The network layer
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.
100 meters
Layer 4

12. Which two of the following values does STP take into consideration when it elects the root bridge?
Show arp and Show interface
Device Identifiers - Capabilities list - Platform
The Bridgeg ID and The bridge priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

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?
The interfaces must be configured for NAT.
Application
To allow remote management of the switch.
Decrease the window size.

14. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Layer 4
STP
An additional broadcast domain will be created.
TCP

15. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Layer 4
Port security
Duplex mismatch

16. 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?
Increased latency and Filtering of all frame errors
802.1Q and ISL
The network layer
Congestion avoidance - Windowing and Buffering

17. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
Show cdp neighbor detail
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

18. 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
Application
The network layer
The Bridgeg ID and The bridge priority
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

19. Which of the following correctly describe steps in the OSI date encapsulation process?
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 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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Path selections and Packet switching.

20. 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
To allow remote management of the switch.
SMTP - FTP - HTTP - and HTTPS
VLAN and Swtich
It operates without collisions and It provides faster data transfer

21. 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 interfaces must be configured for NAT.
Fiber optic cable.
Duplex mismatch
SMTP FTP and HTTP

22. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Encapsulations PPP and authentication CHAP
STP
Hosts use a logical bus topology
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.

23. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
The Bridgeg ID and The bridge priority
VTP will allow switches to share VLAN configuration information
The switch will forward the frame to a specific port
ARP and ICMP

24. Which of the following are spanning tree port states?
100 meters
802.3ab and 802.3z
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Learning - Listening - and Forwarding

25. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
Layer 3
SMTP - FTP - HTTP - and HTTPS
Transport
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

26. 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
STP
The port is experiencing errors
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.

27. 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?
Network
Configure the switch so that it has a lower priority than other switches in the network.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Port security

28. With regard to Ethernet media access methods - which of the following are true?
Packet switching - Packet filtering and Internetwork communication.
Auto - Desirable - and On
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.
Layer 3

29. 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?
The network layer
Certkiller B > trace
100 meters
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.

30. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Certkiller B > trace
This is an Ethernet port operating at half duplex
Configure the switch so that it has lower priority than other switches in the network
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

31. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Physical Layer and Datalink Layer
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.
Learning - Listening - and Forwarding
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

32. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

33. 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.
TCP
Application
Layer 4
The port is experiencing errors

34. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The switch will forward the frame to a specific port
Physical Layer and Datalink Layer
Auto - On - and Desirable
VTP will allow switches to share VLAN configuration information

35. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Congestion avoidance - Windowing and Buffering
A cross-over cable
Duplex mismatch
Packet switching - Packet filtering and Internetwork communication.

36. 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?
Sequence number - Window size - and Acknowledgment number
The network layer
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.
Telnet and FTP

37. 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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38. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Data link
This is an Ethernet port operating at half duplex
An additional broadcast domain will be created.
VTP will allow switches to share VLAN configuration information

39. 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?
Packet switching - Packet filtering and Internetwork communication.
In an improperly implemented redundant topology
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

40. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VLAN and Swtich
Encapsulations PPP and authentication CHAP

41. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
HTTPS - SMTP - and TFTP
Increased latency and Filtering of all frame errors
Decrease the window size.

42. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Learning - Listening - and Forwarding

43. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
ARP and ICMP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Sequence number - Window size - and Acknowledgment number

44. Which of the following services use TCP?
Packet switching - Packet filtering and Internetwork communication.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP FTP and HTTP
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.

45. By default - which of the following factors determines the spanning-tree path cost?
Layer 4
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.
To allow remote management of the switch.
It is the sum of the costs based on bandwidth

46. 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.
It is the sum of the costs based on 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.
It operates without collisions and It provides faster data transfer

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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Hosts use a logical bus topology
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

48. 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?
Show cdp neighbor detail
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.
Buffering - Cut-through - and Congestion avoidance
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

49. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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.
It operates without collisions and It provides faster data transfer
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

50. 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.
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
Encapsulations PPP and authentication CHAP