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. 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?
802.1Q and ISL
The switch will forward the frame to a specific 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.
It is used to prevent switching loops in networks with redundant switched routes.

2. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

3. 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.
802.1Q and ISL
Fiber optic cable.
The interfaces must be configured for NAT.

4. Which fields are included in the TCP header?
Decrease the window size.
Source Port - Acknowledgment Number - and Window
Layer 4
The sequence number in the TCP header.

5. With regard to Ethernet media access methods - which of the following are true?
Source Port - Acknowledgment Number - and Window
100 meters
ARP and ICMP
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.

6. 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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Application
Physical Layer and Datalink Layer
Buffering - Cut-through - and Congestion avoidance

7. 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?
100 meters
Encapsulations PPP and authentication CHAP
802.1Q and ISL
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

8. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
SMTP - FTP - HTTP - and HTTPS
The Bridgeg ID and The bridge priority

9. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Physical Layer and Datalink Layer
Increased latency and Filtering of all frame errors
VLAN and Swtich

10. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
SMTP FTP and HTTP
ARP and ICMP

11. 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?
MAC Address and Bridge Priority
To allow remote management of the switch.
The system is malfunctioning.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

12. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
TCP

13. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
ARP and ICMP
A broadcast address will never be the source address of a frame
An electrical pulse indicates that the collision has cleared.
The port is experiencing errors

14. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Network
VTP
Data link
The network layer

15. Which of the following correctly describe the various functions and virtues of a router?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Physical Layer and Datalink Layer
In an improperly implemented redundant topology
Packet switching - Packet filtering and Internetwork communication.

16. 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
Layer 4
SMTP FTP and HTTP
Data link
Data link

17. 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
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.
HTTPS - SMTP - and TFTP

18. 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?
Network
Telnet and FTP
SMTP - FTP - HTTP - and HTTPS
An additional broadcast domain will be created.

19. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To allow remote management of the switch.
Fiber optic cable.
Serial0/1 is down - line protocol is down

20. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
Path selections and Packet switching.
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.
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
MAC Address and Bridge Priority

21. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
It is the sum of the costs based on bandwidth
Increased latency and Filtering of all frame errors
Learning - Listening - and Forwarding

22. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
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.
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.
Auto - On - and Desirable

23. Which of the following services use TCP?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The network layer
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.

24. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
The system is malfunctioning.
Auto - Desirable - and On
The sequence number in the TCP header.
Packet switching - Packet filtering and Internetwork communication.

25. Which three of the protocols below belong to the application layer? (Select three answer choices)
Data link
HTTPS - SMTP - and TFTP
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.
VTP will allow switches to share VLAN configuration information

26. 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
Congestion avoidance - Windowing and Buffering
Duplex mismatch
HTTPS
802.1Q and ISL

27. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A cross-over cable
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.

28. 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?
An electrical pulse indicates that the collision has cleared.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
ARP and ICMP

29. 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?
Congestion avoidance - Windowing and Buffering
Layer 3
The network layer
Device Identifiers - Capabilities list - Platform

30. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Encapsulations PPP and authentication CHAP
STP
A broadcast address will never be the source address of a frame

31. Which protocol uses TCP port 443 at layer 4?
Congestion avoidance - Windowing and Buffering
Learning - Listening - and Forwarding
HTTPS
Show cdp neighbor detail

32. 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?
Data link
In an improperly implemented redundant topology
Show arp and Show interface
Show cdp neighbor detail

33. 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?
Duplex mismatch
A hub and A repeater.
The network layer
It is used to prevent switching loops in networks with redundant switched routes.

34. 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?
802.1Q and ISL
Configure the switch so that it has a lower priority than other switches in the network.
It operates without collisions and It provides faster data transfer
Data link

35. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
SMTP FTP and HTTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Packet switching - Packet filtering and Internetwork communication.
100 meters

36. 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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37. What is the IEEE standard associated with Gigabit Ethernet?
Hosts use a logical bus topology
802.3ab and 802.3z
Network
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

38. 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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The sequence number in the TCP header.
STP

39. 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.)
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the switch.
MAC Address and Bridge Priority

40. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
It is the sum of the costs based on bandwidth
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.
Port security
HTTPS - SMTP - and TFTP

41. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
An additional broadcast domain will be created.
Physical Layer and Datalink Layer
It operates without collisions and It provides faster data transfer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

42. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Serial0/1 is down - line protocol is down
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?
SMTP - FTP - HTTP - and HTTPS
The network layer
Hosts use a logical bus topology
HTTPS - SMTP - and TFTP

44. 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 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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
HTTPS
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

45. 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.
An electrical pulse indicates that the collision has cleared.
Layer 4
It operates without collisions and It provides faster data transfer

46. Which of the following are spanning tree port states?
In an improperly implemented redundant topology
Serial0/1 is down - line protocol is down
HTTPS
Learning - Listening - and Forwarding

47. 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?
Configure the switch so that it has lower priority than other switches in the network
100 meters
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.
MAC Address and Bridge Priority

48. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
TCP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Layer 4

49. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
To allow remote management of the switch.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Show arp and Show interface
A broadcast address will never be the source address of a frame

50. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP
An electrical pulse indicates that the collision has cleared.
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.