CCNA2 – Module 1 V.4

1. If a router cannot find a valid configuration file during the startup sequence, what will occur?
The router will prompt the user for a response to enter setup mode.

2. Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the connected networks or pings between router interfaces are not working. What is the most likely problem?
The interfaces must be enabled with the no shutdown command.

3. Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.)
The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.
An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.

4. Refer to the exhibit. The frame shown in the exhibit was received by the router. The router interfaces are operational. How will the router process this frame? (Choose two.)
The router will change the frame type to one supported by the WAN link before forwarding the frame.
The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface.

5. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)
VTY interface
console interface
privileged EXEC mode

6. Which two statements correctly describe the components of a router? (Choose two.)
ROM contains diagnostics executed on hardware modules.
Flash memory does not lose its contents during a reboot.

7. Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?
The subnet mask of host 2 is incorrect.
Host 1 and host 2 are on different networks.
The switch needs an IP address that is not configured.
The router LAN interface and host 1 are on different networks.
The IP address of host 1 is on a different network than is the LAN interface of the router.

8. Which are functions of a router? (Choose three.)
packet switching
segmentation of broadcast domains
selection of best path based on logical addressing

9. Refer to the exhibit. All routers have a route in its routing table to each network that is shown in the exhibit. Default routes have not been issued on these routers. What can be concluded about how packets are forwarded in this network? (Choose two.)
If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1.
If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.

10. The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.)
Sydney(config-if)# ip address 201.100.53.2 255.255.255.0
Sydney(config-if)# no shutdown
Sydney(config-if)# clock rate 56000

11. Refer to the exhibit. What can be concluded from the output of the running-configuration of a router?
The commands that are displayed determine the current operation of the router.

12. Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.)
destination IP address: 192.168.10.134
destination MAC address: 9999.DADC.1234

13. What is the outcome of entering these commands?
R1(config)# line vty 0 4
R1(config-line)# password check123
R1(config-line)# login
sets the password to be used for connecting to this router via Telnet

14. Which of the following is the correct flow of routines for a router startup?
load bootstrap, load IOS, apply configuration

15. What three processes does a router execute when it receives a packet from one network that is destined for another network? (Choose three.)
decapsulates the Layer 3 packet by stripping off the Layer 2 frame header
uses the destination IP Address in the IP header to look up the next-hop address in the routing table
encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface

16. The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?
cross-over
Which two statements describe characteristics of load balancing? (Choose two.)
Load balancing allows a router to forward packets over multiple paths to the same destination network.
Unequal cost load balancing is supported by EIGRP.

17. What information about the router and its startup process can be gathered from the output of the show version command? (Choose three.)
the last restart method
the configuration register settings
the location from where the IOS loaded

18. Which interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.)
1
4

19. From what location can a router load the Cisco IOS during the boot process? (Choose two.)
TFTP server
Flash memory

20. A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?
Router1# copy running-config startup-config

21. What is the default sequence for loading the configuration file?
NVRAM, TFTP, CONSOLE

22. What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?
the Layer 2 source and destination address

Refer to the exhibit. Host A wants to access e-mail. Which destination socket number will be used to communicate this request?

10.10.1.3:25
2Refer to the exhibit. The tracert command used from host X to host Y was successful. What is the correct sequence of intermediary network devices that will be present in the trace list?

router B, router E, router F, host Y

3Which OSI layer uses the header information to reassemble the data segments into streams?

transport layer
4
A network administrator uses the copy startup-config running-config command on a router to make configuration changes. Which component is affected by this command?

NVRAM
5

transport layer

Dung

6

Refer to the exhibit. The router of the company failed and was replaced. After the replacement, hosts C and D in the Education office are able to ping each other, but they are unable to access the hosts in the Accounts office. What is the likely cause of the problem?

The subnet mask at the fa0/1 interface of the router is incorrectly entered.

7
Which range of port numbers is assigned dynamically to client applications when initiating a connection to the server?

49152 to 65535

8

Refer to the exhibit. The NAT functionality of the router is enabled to provide the PC with Internet access. Which IP address can be assigned to router interface Fa0/0?

192.168.1.1

9
What information is contained in the header of Layer 3 to help data delivery?

destination host logical address

10

Connection 1 – crossover cable Connection 2 – straight-through cable Connection 3 – crossover cable

11
What are two characteristics of the data link layer? (Choose two.)

It exchanges the frames between nodes.

It manages the transfer of data between the processes that run on each host.

12
To enhance security in a network, the network administrator uses these commands:

Router(config)# line console 0
Router(config-line)# password j1mdi2
Router(config-line)# login

What two conclusions are evident from these commands? (Choose two.)

Users who attempt to connect to the console port of the router must enter a password.

The entries permit access through the console by the use of j1mdi2 as the password.

13
Which memory contents will change as a result of using the Router# erase startup-config command on a router?

NVRAM

14
Which OSI layer manages data segments?

transport layer

15
Which device should be used for enabling a host to communicate with another host on a different network?

router

16

Refer to the exhibit. A network technician wants to connect host A to the console of a Cisco switch to initialize the configuration. What type of cable is required for this connection?

rollover cable

17

Refer to the exhibit. A user wants to view the current configuration. The output of the ipconfig/all command is displayed in the exhibit. What three facts can be determined from the output? (Choose three.)

This PC cannot communicate with other networks.

The network can have 14 hosts.

The assigned address is a private address.
Khong nhin thay hinh (chua check)
18
Refer to the exhibit. Cable 1 and Cable 2 are wired for specific physical layer requirements. The table lists each segment by number and the cable that connects the network components on that segment. Which three segments have the correct cables installed? (Choose three.)

segment 1

segment 4

segment 5

19

Refer to the exhibit. A PC is connected to a network. Which action will verify that the PC can communicate with its default gateway?

Use the ping 10.0.0.254 command.

20
Which three statements are true about transport layer protocols? (Choose three.)

The UDP transport layer protocol provides for low overhead data delivery.

The TCP transport layer protocol uses windowing and acknowledgments for reliable transfer of data.

The TCP and UDP port numbers are used by application layer protocols.

21

Refer to the exhibit. A router, the table of which is shown, receives a packet that is destined for 192.168.9.4. How will the router treat the packet?

It will drop the packet.

22

Refer to the exhibit. A technician uses the nslookup command on the PC and views the output that is displayed in the exhibit. What does abc.xyz.local in the output represent? (Choose two.)

the primary domain name server for the host

the IP address of the website resolver1.abc.local

Sai. Dung la 4,5

23
How does the transport layer allow a host to maintain multiple, simultaneous communication streams across different applications?

It uses multiple ports.

24

Refer to the exhibit. While configuring a network, a technician wired each end of a Category 5e cable as shown. Which two statements are true about this setup? (Choose two.)

The cable is suitable for connecting a switch to a router Ethernet port.

The cable is suitable for connecting dissimilar types of devices.

25
A network administrator wants to restrict access to the router privileged EXEC mode. Which password should the administrator use?

enable

26
Which three IPv4 addresses represent valid network addresses for a subnet? (Choose three.)

192.168.9.64/28

192.168.9.96/28

192.168.9.64/26

27

Refer to the exhibit. The network administrator uses the netstat command to display the open, active, and running TCP connections on a networked host. The exhibit displays the output of this command. Which two facts can be determined from this output for accessing www.cisco.com? (Choose two.)

The source port of the host is 3166.

The destination port is 80.

28
Which two types of media can provide bandwidth up to 1 Gb/s? (Choose two.)

1000 BASE-TX

1000 BASE-SX

29

Refer to the exhibit. The diagram represents the process of sending e-mail between clients. Which list correctly identifies the component or protocol used at each numbered stage of the diagram?

1.MUA 2.SMTP 3.MTA 4.SMTP 5.MTA 6.MDA 7.POP 8.MUA

30

Refer to the exhibit. Host A is transmitting data to host B. Which address combination will be used as the data leaves the Router1 Fa0/1 interface?

Destination IP: 192.168.10.4 Source MAC: 0030.8596.DE81

31

Refer to the exhibit. RouterB is configured properly. The Ethernet interface Fa0/0 of RouterA is configured with the use of the commands that are shown. However, a ping from the Fa0/0 interface of RouterA to the Fa0/0 interface of RouterB is unsuccessful. What action should be taken on RouterA to solve this problem?

Use the no shutdown command on the FastEthernet interface Fa0/0.

32

Refer to the exhibit. Which two facts can be determined about the topology? (Choose two.)

Four collision domains are present.

Two broadcast domains are present.

33

Refer to the exhibit. An employee wants to access the organization intranet from home. Which intermediary device should be used to connect the organization intranet to the Internet to enable this access?

router

34
Which subnet mask will allow 2040 hosts per subnet on the IP network 10.0.0.0?

255.255.248.0

35
While configuring a router, a network technician wants to name the router. Which prompt should the technician see when entering the hostname command?

Router(config)#

36
An organization has decided to use IP addresses in the range 172.20.128.0 to 172.20.143.255. Which combination of network ID and subnet mask identifies all IP addresses in this range?

Network ID: 172.20.128.0 Subnet mask: 255.255.240.0

37

Refer to the exhibit. The host was disconnected from switch 2 and connected to switch 1. Which combination of IP address, subnet mask, and default gateway should be assigned to this host to allow it to function in the network?

IP address: 10.10.9.37 Subnet mask: 255.255.255.224 Default gateway: 10.10.9.35

38

Refer to the exhibit. Host A wants to connect to host B on a different network. Which three IP addresses can be assigned to host A to enable this connectivity? (Choose three.)

172.16.11.88

172.16.11.70

172.16.11.67

39
What are three characteristics of CSMA/CD? (Choose three.)

Devices listen to the media and transmit data only when they cannot detect another signal on the media.

Devices communicate based on a configured priority.

When a collision occurs, all devices stop transmitting for a randomly generated period of time.

40

Refer to the exhibit. Host A attempts to establish a TCP/IP session with host C. During this attempt, a frame was captured at the FastEthernet interface fa0/1 of router Y. The packet inside the captured frame has the IP source address 172.16.1.5, and the destination IP address is 172.16.7.24. What is the source MAC address of the frame at the time of capture?

0060.7320.B826

41
Which three statements are true about network layer addressing? (Choose three.)

It supports data communications between networks.

It prevents broadcasts.

It uniquely identifies each host.

42

Refer to the exhibit. A user wants to access the Internet from the PC. A part of the running configuration of the router is shown. Which default gateway IP address should be configured at the PC to enable this access?

10.1.192.1

43

Refer to the exhibit. All devices in the network use default configurations. How many broadcast domains are there in this topology?

5

44

Refer to the exhibit. Host A sends a frame with the destination MAC address as FFFF.FFFF.FFFF. What action will the switch take for this frame?

It will send the frame to all hosts except host A.

45
Two routers are connected via their serial ports in a lab environment. The routers are configured with valid IP addresses, but they cannot ping each other. The show interface serial0/0 command shows that the serial0/0 interface is up but the line protocol is down. What could be the cause of this problem?

The clock rate command has not been entered on the DCE interface.

46

Refer to the exhibit. Host A and B are unable to communicate with each other. What is the reason for this?

The gateway addresses are network addresses.

47

Refer to the exhibit. In a network, Hosts A and B are exchanging segments at the transport layer. Which two statements are true about this exchange? (Choose two.)

Host A is transferring files to host B using FTP.

Host A will send the next segment containing data for this session starting with byte number 11.

The segment from the destination host indicates that 11 bytes have been received successfully.

Host A is initiating a Telnet session to host B.

Host B can send the next segment of the data starting with byte number 2.

48

Refer to the exhibit. The network administrator remotely accesses the CLI of RouterB from PC1 using a secure connection. Which statement is true about this connection?

The SSH service is used to connect PC1 to RouterB.

49

Refer to the exhibit. Which logical topology describes the exhibited network?

ring

50
Which three addresses belong to the category of private IP addresses? (Choose three.)
10.0.0.1
172.16.0.1
192.168.0.1

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CCNA1 Module 9

CCNA1 – Module 9 V.4
Posted by KRON2529 | 1:41 AM
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1 In the graphic, Host A has reached 50% completion in sending a 1 KB Ethernet frame to Host D when Host B wishes to transmit its own frame to Host C. What must Host B do?
Host B can transmit immediately since it is connected on its own cable segment.
Host B must wait to receive a CSMA transmission from the hub, to signal its turn.
Host B must send a request signal to Host A by transmitting an interframe gap.
**Host B must wait until it is certain that Host A has completed sending its frame.

2 Ethernet operates at which layers of the OSI model? (Choose two.)
Network layer
Transport layer
**Physical layer
Application layer
Session layer
**Data-link layer

3 Which of the following describe interframe spacing? (Choose two.)
**the minimum interval, measured in bit-times, that any station must wait before sending another frame
the maximum interval, measured in bit-times, that any station must wait before sending another frame
the 96-bit payload padding inserted into a frame to achieve a legal frame size
the 96-bit frame padding transmitted between frames to achieve proper synchronization
**the time allowed for slow stations to process a frame and prepare for the next frame
the maximum interval within which a station must send another frame to avoid being considered unreachable

4 What three primary functions does data link layer encapsulation provide? (Choose three.)
**addressing
**error detection
**frame delimiting
port identification
path determination
IP address resolution

5 When a collision occurs in a network using CSMA/CD, how do hosts with data to transmit respond after the backoff period has expired?
**The hosts return to a listen-before-transmit mode. <—
The hosts creating the collision have priority to send data.
The hosts creating the collision retransmit the last 16 frames.
The hosts extend their delay period to allow for rapid transmission.

6 What are three functions of the upper data link sublayer in the OSI model? (Choose three.)
recognizes streams of bits
**identifies the network layer protocol
**makes the connection with the upper layers
identifies the source and destination applications
**insulates network layer protocols from changes in physical equipment
determines the source of a transmission when multiple devices are transmitting

7 What does the IEEE 802.2 standard represent in Ethernet technologies?
MAC sublayer
Physical layer
**Logical Link Control sublayer
Network layer

8 Why do hosts on an Ethernet segment that experience a collision use a random delay before attempting to transmit a frame?
A random delay is used to ensure a collision-free link.
A random delay value for each device is assigned by the manufacturer.
A standard delay value could not be agreed upon among networking device vendors.
**A random delay helps prevent the stations from experiencing another collision during the transmission.

9 Refer to the exhibit. Which option correctly matches the frame field type with the contents that frame field includes?
header field – preamble and stop frame
**data field – network layer packet
data field – physical addressing
trailer field – FCS and SoF

10 Host A has an IP address of 172.16.225.93 and a mask of 255.255.248.0. Host A needs to communicate with a new host whose IP is 172.16.231.78. Host A performs the ANDing operation on the destination address. What two things will occur? (Choose two.)
Host A will change the destination IP to the IP of the nearest router and forward the packet.
Host A will broadcast an ARP request for the MAC of its default gateway.
A result of 172.16.225.0 will be obtained.
**Host A will broadcast an ARP request for the MAC of the destination host.
A result of 172.16.224.0 will be obtained.
**A result of 172.16.225.255 will be obtained.

11 Which of the following is a drawback of the CSMA/CD access method?
**Collisions can decrease network performance.
It is more complex than non-deterministic protocols.
Deterministic media access protocols slow network performance.
CSMA/CD LAN technologies are only available at slower speeds than other LAN technologies.

12 Ethernet operates at which layer of the TCP/IP network model?
application
physical
transport
internet
data link
**network access

13 What is the primary purpose of ARP?
translate URLs to IP addresses
**resolve IPv4 addresses to MAC addresses
provide dynamic IP configuration to network devices
convert internal private addresses to external public addresses

14 Refer to the exhibit. The switch and workstation are administratively configured for full-duplex operation. Which statement accurately reflects the operation of this link?
**No collisions will occur on this link.
Only one of the devices can transmit at a time.
The switch will have priority for transmitting data.
The devices will default back to half duplex if excessive collisions occur.

15 Refer to the exhibit. Host_A is attempting to contact Server_B. Which statements correctly describe the addressing Host_A will generate in the process? (Choose two.)
A packet with the destination IP of Router_B.
A frame with the destination MAC address of Switch_A.
A packet with the destination IP of Router_A.
**A frame with the destination MAC address of Router_A.
**A packet with the destination IP of Server_B.
A frame with the destination MAC address of Server_B.

16 Which statements correctly describe MAC addresses? (Choose three.)
dynamically assigned
**copied into RAM during system startup
layer 3 address
**contains a 3 byte OUI
**6 bytes long
32 bits long

17 Which two features make switches preferable to hubs in Ethernet-based networks? (Choose two.)
reduction in cross-talk
**minimizing of collisions
support for UTP cabling
division into broadcast domains
**increase in the throughput of communications

18 What are the two most commonly used media types in Ethernet networks today? (Choose two.)
coaxial thicknet
**copper UTP
coaxial thinnet
**optical fiber
shielded twisted pair

19 Convert the binary number 10111010 into its hexadecimal equivalent. Select the correct answer from the list below.
85
90
**BA
A1
B3
1C

20 After an Ethernet collision, when the backoff algorithm is invoked, which device has priority to transmit data?
the device involved in the collision with the lowest MAC address
the device involved in the collision with the lowest IP address
**any device in the collision domain whose backoff timer expires first
those that began transmitting at the same time

CCNA 1 – Module 8

1
Which type of cable run is most often associated with fiber-optic cable?
Xbackbone cable
horizontal cable
patch cable
work area cable

2
In most business LANs, which connector is used with twisted-pair networking cable?
**RJ-45

3
When is a straight-through cable used in a network?
**when connecting a host to a switch

4
With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
**the magnetic field around the adjacent pairs of wire

5
Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
**Physical

6
An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
**OTDR

7
XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)
**coax
**Cat6 UTP

8
What is a possible effect of improperly applying a connector to a network cable?
**Data transmitted through that cable may experience signal loss.

9 What are three measures of data transfer? (Choose three.)
goodput
**frequency
**throughput
**bandwidth

10  Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?

**crossover cable

11
In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?
**fiber

12
Which fiber connector supports full duplex Ethernet?
kolmas

13
Which method of signal transmission uses radio waves to carry signals?
**wireless

14
Which characteristics describe fiber optic cable? (Choose two.)
**It is not affected by EMI or RFI.
**It is the most expensive type of LAN cabling.

15
Which of the following is a characteristic of single-mode fiber-optic cable?
**generally uses LEDs as the light source

16
What is considered a benefit of wireless as a media choice?
**more host mobility

17
What characteristic of UTP cable helps reduce the effects of interference?
**the twisting of the wires in the cable

18
What is a primary role of the Physical layer in transmitting data on the network?
**create the signals that represent the bits in each frame on to the media

CCNA1 Module 11

CCNA1 6 -key