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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 new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
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 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.
Transport
Packet switching - Packet filtering and Internetwork communication.

2. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
To prevent switching loops in networks with redundant switched paths.
A broadcast address will never be the source address of a frame
Show arp and Show interface
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.

3. Which fields are included in the TCP header?
Packet switching - Packet filtering and Internetwork communication.
Source Port - Acknowledgment Number - and Window
The sequence number in the TCP header.
All switch and bridge ports are in either the forwarding or blocking state.

4. Which protocol uses TCP port 443 at layer 4?
HTTPS
Packet switching - Packet filtering and Internetwork communication.
STP
Learning - Listening - and Forwarding

5. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Show arp and Show interface
Application
Layer 3
100 meters

6. 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?
The port is experiencing errors
MAC Address and Bridge Priority
Show arp and Show interface
An electrical pulse indicates that the collision has cleared.

7. Which of the following services use TCP?
SMTP FTP and HTTP
Physical Layer and Datalink Layer
Switches - Bridges - and Routers
Application

8. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Duplex mismatch
Increased latency and Filtering of all frame errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

9. 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.
The interfaces must be configured for NAT.
Data link
This is an Ethernet port operating at half duplex

10. 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
An additional broadcast domain will be created.
100 meters
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

11. 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?
Layer 3
The interfaces must be configured for NAT.
Decrease the window size.
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.

12. What is the IEEE standard associated with Gigabit Ethernet?
The switch will forward the frame to a specific port
802.3ab and 802.3z
Data link
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

13. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
A cross-over cable
SMTP FTP and HTTP
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

14. What is the purpose of the spanning-tree algorithm in a switched LAN?
SMTP FTP and HTTP
Encapsulations PPP and authentication CHAP
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.
To prevent switching loops in networks with redundant switched paths.

15. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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.
An additional broadcast domain will be created.
Encapsulations PPP and authentication CHAP

16. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
It operates without collisions and It provides faster data transfer
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
Auto - Desirable - and On

17. Which two of the following values does STP take into consideration when it elects the root bridge?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Encapsulations PPP and authentication CHAP
The Bridgeg ID and The bridge priority
Packet switching - Packet filtering and Internetwork communication.

18. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
TCP
An additional broadcast domain will be created.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Path selections and Packet switching.

19. By default - which of the following factors determines the spanning-tree path cost?
To prevent switching loops in networks with redundant switched paths.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
It is the sum of the costs based on bandwidth
Port security

20. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
A hub and A repeater.
Auto - Desirable - and On
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

21. 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
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.
It operates without collisions and It provides faster data transfer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

22. 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?
A cross-over cable
Auto - On - and Desirable
The port is experiencing errors
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

23. Which of the protocols below use TCP at the transport layer?
Increased latency and Filtering of all frame errors
All switch and bridge ports are in either the forwarding or blocking state.
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
SMTP - FTP - HTTP - and HTTPS

24. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Duplex mismatch
Switches increase the number of collision domains in the network.
This is an Ethernet port operating at half duplex

25. 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
To prevent switching loops in networks with redundant switched paths.
A hub and A repeater.
This is an Ethernet port operating at half duplex
Fiber optic cable.

26. 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
Duplex mismatch
Hosts use a logical bus topology
The sequence number in the TCP header.
Physical Layer and Datalink Layer

27. 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?
Duplex mismatch
Increased latency and Filtering of all frame errors
Layer 3
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

28. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Sequence number - Window size - and Acknowledgment number
A cross-over cable
SMTP - FTP - HTTP - and HTTPS

29. With regard to Ethernet media access methods - which of the following are true?
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.
Layer 4
To allow remote management of the switch.

30. 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.
100 meters
Path selections and Packet switching.
Physical Layer and Datalink Layer

31. 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?
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.
The network layer
Switches increase the number of collision domains in the network.
VLAN and Swtich

32. Which of the following are true of Ethernet technology?
Fiber optic cable.
Source Port - Acknowledgment Number - and Window
Hosts use a logical bus topology
VTP

33. 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
VLAN and Swtich
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 will prevent segment 1's broadcasts from getting to segment 2.
Fiber optic cable.

34. 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?
A hub and A repeater.
It is the sum of the costs based on bandwidth
Show cdp neighbor detail
Telnet and FTP

35. 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?
HTTPS
Congestion avoidance - Windowing and Buffering
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.

36. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Show arp and Show interface
The port is experiencing errors
Physical Layer and Datalink Layer

37. 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?
Application
ARP and ICMP
The system is malfunctioning.
Decrease the window size.

38. Which of the following are spanning tree port states?
Layer 4
Learning - Listening - and Forwarding
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 network layer

39. 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?
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
Sequence number - Window size - and Acknowledgment number
The sequence number in the TCP header.
802.1Q and ISL

40. 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.
VLAN and Swtich
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

41. 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.
Hosts use a logical bus topology
Configure the switch so that it has lower priority than other switches in the network
The switch will forward the frame to a specific port

42. 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?
Physical Layer and Datalink Layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Packet switching - Packet filtering and Internetwork communication.
VTP

43. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
The sequence number in the TCP header.
Configure the switch so that it has a lower priority than other switches in the network.
CertK Switch(config)# ip default-gateway 192.168.1.115

44. Which of the following can lead to the contribution of LAN traffic congestion?
Layer 4
To allow remote management of the switch.
Port security
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

45. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
100 meters
All switch and bridge ports are in either the forwarding or blocking state.
Packet switching - Packet filtering and Internetwork communication.
Configure the switch so that it has lower priority than other switches in the network

46. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.
Configure the switch so that it has lower priority than other switches in the network

47. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
A hub and A repeater.
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
802.3ab and 802.3z
Congestion avoidance - Windowing and Buffering

48. 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?
Switches - Bridges - and Routers
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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 network layer

49. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Encapsulations PPP and authentication CHAP

50. 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?
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.
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The Bridgeg ID and The bridge priority