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. 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?
VLAN and Swtich
STP
Congestion avoidance - Windowing and Buffering
This is an Ethernet port operating at half duplex

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?
Show cdp neighbor detail
Learning - Listening - and Forwarding
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Telnet and FTP

3. 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
ARP and ICMP
SMTP - FTP - HTTP - and HTTPS
Learning - Listening - and Forwarding

4. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Layer 4
This is an Ethernet port operating at half duplex
Device Identifiers - Capabilities list - Platform

5. 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?
The network layer
Switches increase the number of collision domains in the network.
VTP
MAC Address and Bridge Priority

6. Which of the following correctly describe steps in the OSI date encapsulation process?
Layer 4
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 prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

7. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same 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.
Port security
802.1Q and ISL

8. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Packet switching - Packet filtering and Internetwork communication.
Switches - Bridges - and Routers
Network

9. Which of the following are spanning tree port states?
A hub and A repeater.
Learning - Listening - and Forwarding
Fiber optic cable.
Switches - Bridges - and Routers

10. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Duplex mismatch
MAC Address and Bridge Priority
Congestion avoidance - Windowing and Buffering

11. 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?
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.
Information about a route should never be sent back in the direction from which the original update came.
Certkiller B > trace
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

12. CDP is running between two CK devices. What information is supplied by CDP?
Configure the switch so that it has lower priority than other switches in the network
Device Identifiers - Capabilities list - Platform
This is an Ethernet port operating at half duplex
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

13. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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.
It is used to prevent switching loops in networks with redundant switched routes.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 4

14. 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
Serial0/1 is down - line protocol is down
CertK Switch(config)# ip default-gateway 192.168.1.115
Auto - Desirable - and On

15. 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
It will prevent segment 1's broadcasts from getting to segment 2.
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 - Desirable - and On

16. Which fields are included in the TCP header?
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.
Source Port - Acknowledgment Number - and Window
Show arp and Show interface
Serial0/1 is down - line protocol is down

17. 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?
Layer 3
It operates without collisions and It provides faster data transfer
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.
ARP and ICMP

18. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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 broadcast address will never be the source address of a frame
VTP
In an improperly implemented redundant topology

19. 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?
The network layer
Data link
Congestion avoidance - Windowing and Buffering
The switch will forward the frame to a specific port

20. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Packet switching - Packet filtering and Internetwork communication.
It operates without collisions and It provides faster data transfer
It is used to prevent switching loops in networks with redundant switched routes.
Hosts use a logical bus topology

21. 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?
The port is experiencing errors
Show cdp neighbor detail
Certkiller B > trace
To prevent switching loops in networks with redundant switched paths.

22. Which protocol uses TCP port 443 at layer 4?
HTTPS
The system is malfunctioning.
Duplex mismatch
The switch will forward the frame to a specific port

23. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
MAC Address and Bridge Priority
Auto - On - and Desirable
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.

24. 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?

25. 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?
Configure the switch so that it has a lower priority than other switches in the network.
The sequence number in the TCP header.
Configure the switch so that it has lower priority than other switches in the network
Encapsulations PPP and authentication CHAP

26. 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?
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
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail

27. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Show arp and Show interface
Buffering - Cut-through - and Congestion avoidance
SMTP - FTP - HTTP - and HTTPS

28. 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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The sequence number in the TCP header.
Source Port - Acknowledgment Number - and Window

29. Which of the protocols below use TCP at the transport layer?
Fiber optic cable.
Application
The interfaces must be configured for NAT.
SMTP - FTP - HTTP - and HTTPS

30. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
An additional broadcast domain will be created.
A cross-over cable
Switches increase the number of collision domains in the network.
VLAN and Swtich

31. 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
Application
SMTP - FTP - HTTP - and HTTPS
It is the sum of the costs based on bandwidth

32. 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.
A cross-over cable
Source Port - Acknowledgment Number - and Window
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.

33. 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?
Certkiller B > trace
The switch will forward the frame to a specific port
Application
Sequence number - Window size - and Acknowledgment number

34. 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?
An electrical pulse indicates that the collision has cleared.
To allow remote management of the switch.
Show arp and Show interface
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

35. 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?
VLAN and Swtich
It is the sum of the costs based on bandwidth
The network layer
Network

36. Which of the following are true of Ethernet technology?
Certkiller B > trace
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
It operates without collisions and It provides faster data transfer

37. 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?
Port security
An electrical pulse indicates that the collision has cleared.
Show arp and Show interface
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

38. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The switch will forward the frame to a specific port
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The system is malfunctioning.
ARP and ICMP

39. Which of the following services use TCP?
SMTP FTP and HTTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
HTTPS
Increased latency and Filtering of all frame errors

40. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
HTTPS - SMTP - and TFTP
Data link
Auto - On - and Desirable
The Bridgeg ID and The bridge priority

41. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
CertK Switch(config)# ip default-gateway 192.168.1.115
The Bridgeg ID and The bridge priority
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network

42. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Buffering - Cut-through - and Congestion avoidance
Information about a route should never be sent back in the direction from which the original update came.
An electrical pulse indicates that the collision has cleared.

43. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
Data link

44. 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.
Congestion avoidance - Windowing and Buffering
Buffering - Cut-through - and Congestion avoidance
Port security

45. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The network layer
The sequence number in the TCP header.
A hub and A repeater.

46. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
Switches - Bridges - and Routers
Encapsulations PPP and authentication CHAP
Duplex mismatch
Show arp and Show interface

47. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The sequence number in the TCP header.

48. Which three of the protocols below belong to the application layer? (Select three answer choices)
Serial0/1 is down - line protocol is down
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.
Information about a route should never be sent back in the direction from which the original update came.
HTTPS - SMTP - and TFTP

49. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
A broadcast address will never be the source address of a frame
Sequence number - Window size - and Acknowledgment number
Layer 4
Configure the switch so that it has a lower priority than other switches in the network.

50. 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
A cross-over cable
The Bridgeg ID and The bridge priority
The network layer
Decrease the window size.