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. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has a lower priority than other switches in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS - SMTP - and TFTP

2. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.
The network layer
Physical Layer and Datalink Layer

3. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
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 system is malfunctioning.
Increased latency and Filtering of all frame errors

4. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Information about a route should never be sent back in the direction from which the original update came.
Network
Decrease the window size.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

5. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Certkiller B > trace

6. 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
802.1Q and ISL
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
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

7. 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?
In an improperly implemented redundant topology
Show arp and Show interface
VTP
Packet switching - Packet filtering and Internetwork communication.

8. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
ARP and ICMP
Information about a route should never be sent back in the direction from which the original update came.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

9. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Application
VLAN and Swtich
Show cdp neighbor detail
Layer 4

10. Which of the following are true of Ethernet technology?
It will prevent segment 1's broadcasts from getting to segment 2.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Hosts use a logical bus topology
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

11. 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 is used to prevent switching loops in networks with redundant switched routes.
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
Path selections and Packet switching.
This is an Ethernet port operating at half duplex

12. 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?
Auto - Desirable - and On
Decrease the window size.
Device Identifiers - Capabilities list - Platform
802.3ab and 802.3z

13. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
It is the sum of the costs based on bandwidth
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

14. 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?
ARP and ICMP
Network
The network layer
Layer 4

15. Which two of the following values does STP take into consideration when it elects the root bridge?
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
Encapsulations PPP and authentication CHAP
ARP and ICMP

16. 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?
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.
Physical Layer and Datalink Layer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
This is an Ethernet port operating at half duplex

17. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Certkiller B > trace

18. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
All switch and bridge ports are in either the forwarding or blocking state.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The switch will forward the frame to a specific port
Transport

19. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.
The network layer

20. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
The network layer
A hub and A repeater.
Auto - On - and Desirable
Device Identifiers - Capabilities list - Platform

21. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Application
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.
MAC Address and Bridge Priority
A cross-over cable

22. 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
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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VLAN and Swtich

23. What are two characteristics of 'store and forward' switching?
VTP will allow switches to share VLAN configuration information
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Application
This is an Ethernet port operating at half duplex

24. 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?
Congestion avoidance - Windowing and Buffering
Hosts use a logical bus topology
It will prevent segment 1's broadcasts from getting to segment 2.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

25. 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?
Show cdp neighbor detail
Packet switching - Packet filtering and Internetwork communication.
Certkiller B > trace
Increased latency and Filtering of all frame errors

26. 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
Data link
This is an Ethernet port operating at half duplex
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The port is experiencing errors

27. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Fiber optic cable.
SMTP FTP and HTTP

28. Which of the following correctly describe steps in the OSI date encapsulation process?
Increased latency and Filtering of all frame errors
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
Configure the switch so that it has a lower priority than other switches in the network.

29. 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.
Layer 4
An additional broadcast domain will be created.
Application
A hub and A repeater.

30. Which of the following services use TCP?
Fiber optic cable.
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

31. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Network
Learning - Listening - and Forwarding
SMTP FTP and HTTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

32. 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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Source Port - Acknowledgment Number - and Window
To allow remote management of the switch.

33. 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
In an improperly implemented redundant topology
The sequence number in the TCP header.
Source Port - Acknowledgment Number - and Window
Buffering - Cut-through - and Congestion avoidance

34. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
It is used to prevent switching loops in networks with redundant switched routes.
Serial0/1 is down - line protocol is down
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.
SMTP - FTP - HTTP - and HTTPS

35. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link
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 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.

36. 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?
The port is experiencing errors
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.

37. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
This is an Ethernet port operating at half duplex
In an improperly implemented redundant topology
Path selections and Packet switching.
Configure the switch so that it has a lower priority than other switches in the network.

38. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Data link
VTP will allow switches to share VLAN configuration information
Network
An electrical pulse indicates that the collision has cleared.

39. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Data link
VLAN and Swtich

40. 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
The network layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
100 meters

41. 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?
Serial0/1 is down - line protocol is down
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3
The network layer

42. 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.
Buffering - Cut-through - and Congestion avoidance
Fiber optic cable.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

43. 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?
Data link
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.
Data link
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.

44. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Layer 4
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In an improperly implemented redundant topology
All switch and bridge ports are in either the forwarding or blocking state.

45. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
A broadcast address will never be the source address of a frame
The switch will forward the frame to a specific port
Path selections and Packet switching.

46. Why is full-duplex Ethernet superior to its single-duplex counterpart?
MAC Address and Bridge Priority
VLAN and Swtich
It operates without collisions and It provides faster data transfer
Encapsulations PPP and authentication CHAP

47. 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
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
Fiber optic cable.
Duplex mismatch

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?
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.
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
It is used to prevent switching loops in networks with redundant switched routes.

49. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
It will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.
It is the sum of the costs based on bandwidth
An electrical pulse indicates that the collision has cleared.

50. 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.
Auto - Desirable - and On
Hosts use a logical bus topology
A broadcast address will never be the source address of a frame