• (Khác biệt giữa các bản)
    n (đ3)
    Hiện nay (07:25, ngày 24 tháng 8 năm 2013) (Sửa) (undo)
    (ospf)
     
    (4 intermediate revisions not shown.)
    Dòng 1: Dòng 1:
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    1 A PC can not connect to any remote websites, ping its default gateway, or ping a printer that is functioning properly on the local network segment. Which action will verify that the TCP/IP stack is functioning correctly on this PC?
    		+
    WB2: Router>en
    -
    -Use the ping 127.0.0.1 command at the command prompt.
    		+
     
    -
    2 Refer to the exhibit. Which set of devices contains only intermediary devices?
    		+
    Router#config t
    -
    -A, B, D, G
    		+
     
    -
    3 Refer to the exhibit. When computer A sends a frame to computer D, what computers receive the frame?
    		+
    Router(config)#hostname WB2
    -
    -only computer D
    		+
     
    -
    4.Which password is automatically encrypted when it is created?
    		+
    WB2(config)#enable password cisco
    -
    enable secret
    		+
     
    -
    5.Which three statements characterize the transport layer protocols? (Choose three.)
    		+
    WB2(config)#enable secret class
    -
    -TCP and UDP port numbers are used by application layer protocols.
    		+
     
    -
    -TCP uses windowing and sequencing to provide reliable transfer of data.
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    WB2(config)#banner motd *Autorized acces only!*
    -
    -TCP is a connection-oriented protocol. UDP is a connectionless protocol.
    		+
     
    -
    6. Which type of media is immune to EMI and RFI? (Choose two.)
    		+
    WB2(config)#line vty 0 4
    -
    100 Base-FX
    		+
     
    -
    100 Base LX
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    WB2(config-line)#password cisco
    -
    7. Refer to the exhibit. A technician is working on a network problem that requires verification of the router LAN interface. What address should be pinged from this host to confirm that the router interface is operational?
    		+
     
    -
    192.168.254.1
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    WB2(config-line)#login
    -
    9 .Refer to the exhibit. What function does router RT_A need to provide to allow Internet access for hosts in this network?
    		+
     
    -
    address translation
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    WB2(config-line)#exit
    -
    10 .Refer to the exhibit. The network containing router B is experiencing problems. A network associate has isolated the issue in this network to router B? What action can be preformed to correct the network issue?
    		+
     
    -
    issue the no shutdown command on interface FastEthernet 0/1
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    WB2(config)#line console 0
    -
    11 .Which three IPv4 addresses represent a broadcast for a subnet? (Choose three.)
    		+
     
    -
    172.16.4.63 /26
    		+
    WB2(config-line)#password cisco
    -
    172.16.4.191 /26
    		+
     
    -
    172.16.4.95 /27
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    WB2(config-line)#login
    -
    12 .What are three characteristics of CSMA/CD? (Choose three.)
    		+
     
    -
    -A device listens and waits until the media is not busy before transmitting.
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    WB2(config-line)#exit
    -
    -All of the devices on a segment see data that passes on the network medium.
    		+
     
    -
    -After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
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    WB2(config)#int fa0/0
    -
    13.In a Cisco IOS device, where is the startup-configuration file stored?
    		+
     
    -
    -NVRAM
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    WB2(config-if)#ip add 172.16.100.129 255.255.255.192
    -
    14. A routing issue has occurred in you internetwork. Which of the following type of devices should be examined to isolate this error?
    		+
     
    -
    -router
    		+
    WB2(config-if)#no sh
    -
    15. Which OSI layer protocol does IP rely on to determine whether packets have been lost and to request retransmission?
    		+
     
    -
    -transport
    		+
    WB2(config-if)#exit
    -
    16.Due to a security violation, the router passwords must be changed. What information can be learned from the following configuration entries? (Choose two.)
    		+
     
    -
    Router(config)# line vty 0 3
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    WB2(config)#int fa0/1
    -
    Router(config-line)# password c13c0
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    -
    Router(config-line)# login
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    WB2(config-if)#ip add 172.16.100.225 255.255.255.240
    -
    The entries specify four Telnet lines for remote access.
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    -
    XX Access will be permitted for Telnet using "c13c0" as the password.
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    WB2(config-if)#no sh
    -
    17.Which prompt represents the appropriate mode used for the copy running-config startup-config command ?
    		+
     
    -
    -Switch-6J#
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    WB2(config-if)#ip ospf priority 50
    -
    18.Which combination of network id and subnet mask correctly identifies all IP addresses from 172.16.128.0 through -172.16.159.255?
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    -
    -172.16.128.0 255.255.224.0
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    WB2(config-if)#ip ospf hello-interval 20
    -
    19. When must a router serial interface be configured with the clock rate command?
    		+
     
    -
    -when the interface is functioning as a DCE device
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    WB2(config-if)#exit
    -
    20.When connectionless protocols are implemented at the lower layers of the OSI model, what are usually used to acknowledge the data receipt and request the retransmission of missing data?
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    -
    -upper-layer connection-oriented protocols
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    WB2(config)#int s0/0/0
    -
    21.A technician is asked to secure the privileged EXEC mode of a switch by requiring a password. Which type of password would require this login and be considered the most secure?
    		+
     
    -
    -enable secret
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    WB2(config-if)#ip add 172.16.100.242 255.255.255.252
    -
    22.Refer to the exhibit. What is required on host A for a network technician to create the initial configuration on RouterA?
    		+
     
    -
    a terminal emulation program
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    WB2(config-if)#no sh
    -
    23.Refer to the exhibit. A network administrator remotely accesses the CLI of RouterB from PC1. Which two statements are true about the application layer protocol that is used to make this connection? (Choose two.)
    		+
     
    -
    -The connection type is called a VTY session.
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    WB2(config-if)#exit
    -
    -The application name is the same for the service, protocol, and client.
    		+
     
    -
    25.Refer to the exhibit. What two facts can be determined about the exhibited topology? (Choose two.)
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    WB2(config)#int lo0
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    A single broadcast domain is present
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    -
    Five collision domains exist.
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    WB2(config-if)#ip add 10.0.0.2 255.255.255.255
    -
    26. Refer to the exhibit. A network technician is trying to determine the correct IP address configuration for Host A. What is a valid configuration for Host A?
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    -
    -IP address: 192.168.100.20; Subnet Mask: 255.255.255.240; Default Gateway: 192.168.100.17
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    WB2(config-if)#exit
    -
    27. Refer to the exhibit. Cable 1 and cable 2 have the ends wired for specific physical layer requirements. The table lists each segment by number and the cable which has been installed by the network technician between the network components on that segment. From the data given, which segments have the correct cable installed? (Choose three.)
    		+
     
    -
    XX segment1
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    WB2(config)#router ospf 1
    -
    XX segment3
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    -
    XX segment4
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    WB2(config-router)#network 172.16.100.128 0.0.0.63 area 0
    -
    28. What is true regarding network layer addressing? (Choose three.)
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    -
    XX heirarchical
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    WB2(config-router)#network 172.16.100.240 0.0.0.3 area 0
    -
    XX uniquely identifies each host
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    -
    XX contains a network portion
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    WB2(config-router)#network 172.16.100.224 0.0.0.15 area 0
    -
    29.Refer to the exhibit. A router, whose table is shown, receives a packet that is destined for 192.168.1.4. How will router treat the packet?
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    -
    XX The packet will be forwarded to the destination host.
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    WB2(config-router)#passive-interface fa0/0
    -
    30. Refer to the exhibit. Which two statements describe the information that is represented in the header? (Choose two.)
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    -
    XX The destination port indicates a Telnet session.
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    WB2(config-router)#exit
    -
    XX The return segment will contain a source port of 23.
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    -
    31.Refer to the exhibit. What is the correct destination socket number for a web page request from Host A to the web server?
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    WB2(config)#exit
    -
    XX 198.133.219.25:80
    		+
     
    -
    32.During the encapsulation process, which identifiers are added at the transport layer?
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    XX two applications communicating the data
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    WB1: cisco WB1
    -
    33.Refer to the exhibit. A student has wired each end of a CAT 5e cable as shown. What is the result? (Choose two.)
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    -
    XX The cable is suitable for use as a Fast Ethernet crossover.
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    >en class
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    XX The cable is suitable for use between two 100 Mbps Auto-MDIX capable switches.
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    -
    34.Refer to the exhibit. Assume all devices are using default configurations. How many subnets are required to address the topology that is shown?
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    WB1# config t
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    XX 3
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    -
    35. Refer to the exhibit. On the basis of the IP configuration that is shown, what is the reason that Host A and Host B are unable to communicate outside the local network?
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    WB1(config)#int fa0/1
    -
    XX The gateway address was assigned a broadcast address.
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    -
    36.Refer to the exhibit. Each media link is labeled. What type of cable should be used to connect the different devices?
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    -
    XX Connection 1 - straight-through cable
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    WB1(config-if)#ip add 172.16.100.238 255.255.255.240
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    Connection 2 - crossover cable
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    -
    Connection 3 - straight-through cable
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    WB1(config-if)#no sh
    -
    37.Refer to the exhibit. What does the IP address 192.168.33.2 represent?
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    -
    XX The host's primary domain name server.
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    -
    38. Refer to the exhibit. What two facts can be determined from the information that is given? (Choose two.)
    		+
    WB1(config-if)#ip ospf priority 100
    -
    XX The destination port indicates that an HTTP session has been initiated.
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    -
    XX The data listed is associated with the transport layer.
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    WB1(config-if)#ip ospf hello-interval 20
    -
    39. Which of the following are the address ranges of the private IP addresses? (Choose three.)
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    -
    XX 10.0.0.0 to 10.255.255.255
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    WB1(config-if)#exit
    -
    XX 172.16.0.0 to 172.31.255.255
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    -
    XX 192.168.0.0 to 192.168.255.255
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    WB1(config)#router ospf 1
    -
    40. Which two functions of the OSI model occur at layer two? (Choose two.)
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    -
    XX physical addressing
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    WB1(config-router)#network 172.16.100.0 0.0.0.127 area 0
    -
    XX media access control
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    -
    41. Which range of port numbers are reserved for services that are commonly used by applications that run on servers?
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    WB1(config-router)#network 172.16.100.244 0.0.0.3 area 0
    -
    XX 0 to 1023
    		+
     
    -
    42. As network administrator, what is the subnet mask that allows 510 hosts given the IP address 172.30.0.0?
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    WB1(config-router)#network 172.16.100.224 0.0.0.15 area 0
    -
    XX 255.255.254.0
    		+
     
    -
    43. Refer to the exhibit. The tracert command is initiated from PC1 to the destination PC4. Which device will send a response to the initial packet from PC1?
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    WB1(config-router)#passive-interface fa0/0
    -
    XX London
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    -
    44. Refer to the exhibit. Host A is transmitting data to host B. What addresses will host A use to for the destination IP and MAC addresses in this communication?
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    -
    XX Destination MAC: EEEE:EEEE:EEEE Destination IP: 172.22.0.75
    		+
    WHQ:
    -
    45. Refer to the exhibit. Which logical topology best describes the exhibited network?
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    -
    XX multiaccess
    		+
    ---> Middels WB2 <---
    -
    46. Examine the graphic with current configurations. Host A in the Clerical offices failed and was replaced. Although a ping to 127.0.0.1 was successful, the replacement computer can not access the company network. What is the likely cause of the problem?
    		+
    -
    XX subnetmask incorrectly entered
    		+
     
    -
    47. Refer to the exhibit. With the router running NAT, what IP addresses can be applied to the computer to allow access to the Internet? (Choose three.)
    		+
    WB2#telnet 172.16.100.241
    -
    XX 192.168.18.49
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    -
    XX 192.168.18.52
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    cisco
    -
    XX 192.168.18.59
    		+
     
    -
    48.Refer to the exhibit. What three statements are true about the IP configuration that is shown? (Choose three.)
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    WHQ>en class
    -
    XXThe address that is assigned to the computer represents private addressing.
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    -
    XX The computer is unable to communicate outside of the local network.
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    WHQ#config t
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    XX The prefix of the computer address is /27.
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    -
    this attempt, a frame was captured with the source MAC address 0050.7320.D632 and the destination MAC address 0030.8517.44C4. The packet inside the captured frame has an IP source address 192.168.7.5, and the destination IP address is 192.168.219.24. At which point in the network was this packet captured?
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    WHQ(config)#ip route 192.168.0.0 255.255.254.0 192.0.0.2
    -
    leaving Dallas
    		+
     
    -
    50.Which of the following OSI layers offers reliable, connection-oriented data communication services?
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    WHQ(config)#ip route 0.0.0.0 0.0.0.0 serial0/1/0
    -
    transport
    		+
     
     +
    WHQ(config)#router ospf 1
     +
    WHQ(config-router)#network 172.16.100.240 0.0.0.3 area 0
     +
     
     +
    WHQ(config-router)#network 172.16.100.244 0.0.0.3 area 0
     +
     
     +
    WHQ(config-router)#passive-interface S0/1/0
     +
     
     +
    WHQ(config-router)#passive-interface s0/1/1
     +
     
     +
    WHQ(config-router)#default-information originate
     +
     
     +
    WHQ(config-router)#exit
     +
     
     +
    WHQ(config)#exit
     +
     
     +
    WHQ#exit
     +
     
     +
     
     +
    WPC2:
     +
    Ip adres: 172.16.100.190
     +
     
     +
    Subnetmasker: 255.255.255.192
     +
     
     +
    Default Gateway: 172.16.100.129

    Hiện nay

    WB2: Router>en

    Router#config t

    Router(config)#hostname WB2

    WB2(config)#enable password cisco

    WB2(config)#enable secret class

    WB2(config)#banner motd *Autorized acces only!*

    WB2(config)#line vty 0 4

    WB2(config-line)#password cisco

    WB2(config-line)#login

    WB2(config-line)#exit

    WB2(config)#line console 0

    WB2(config-line)#password cisco

    WB2(config-line)#login

    WB2(config-line)#exit

    WB2(config)#int fa0/0

    WB2(config-if)#ip add 172.16.100.129 255.255.255.192

    WB2(config-if)#no sh

    WB2(config-if)#exit

    WB2(config)#int fa0/1

    WB2(config-if)#ip add 172.16.100.225 255.255.255.240

    WB2(config-if)#no sh

    WB2(config-if)#ip ospf priority 50

    WB2(config-if)#ip ospf hello-interval 20

    WB2(config-if)#exit

    WB2(config)#int s0/0/0

    WB2(config-if)#ip add 172.16.100.242 255.255.255.252

    WB2(config-if)#no sh

    WB2(config-if)#exit

    WB2(config)#int lo0

    WB2(config-if)#ip add 10.0.0.2 255.255.255.255

    WB2(config-if)#exit

    WB2(config)#router ospf 1

    WB2(config-router)#network 172.16.100.128 0.0.0.63 area 0

    WB2(config-router)#network 172.16.100.240 0.0.0.3 area 0

    WB2(config-router)#network 172.16.100.224 0.0.0.15 area 0

    WB2(config-router)#passive-interface fa0/0

    WB2(config-router)#exit

    WB2(config)#exit


    WB1: cisco WB1

    >en class

    WB1# config t

    WB1(config)#int fa0/1


    WB1(config-if)#ip add 172.16.100.238 255.255.255.240

    WB1(config-if)#no sh


    WB1(config-if)#ip ospf priority 100

    WB1(config-if)#ip ospf hello-interval 20

    WB1(config-if)#exit

    WB1(config)#router ospf 1

    WB1(config-router)#network 172.16.100.0 0.0.0.127 area 0

    WB1(config-router)#network 172.16.100.244 0.0.0.3 area 0

    WB1(config-router)#network 172.16.100.224 0.0.0.15 area 0

    WB1(config-router)#passive-interface fa0/0


    WHQ:

    ---> Middels WB2 <---


    WB2#telnet 172.16.100.241

    cisco

    WHQ>en class

    WHQ#config t

    WHQ(config)#ip route 192.168.0.0 255.255.254.0 192.0.0.2

    WHQ(config)#ip route 0.0.0.0 0.0.0.0 serial0/1/0

    WHQ(config)#router ospf 1 WHQ(config-router)#network 172.16.100.240 0.0.0.3 area 0

    WHQ(config-router)#network 172.16.100.244 0.0.0.3 area 0

    WHQ(config-router)#passive-interface S0/1/0

    WHQ(config-router)#passive-interface s0/1/1

    WHQ(config-router)#default-information originate

    WHQ(config-router)#exit

    WHQ(config)#exit

    WHQ#exit


    WPC2: Ip adres: 172.16.100.190

    Subnetmasker: 255.255.255.192

    Default Gateway: 172.16.100.129

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