Ccna

Front 1

Which 3 statements are true about the operation of a full-duplex Ethernet network

Back 1

- There are no collisions in full-duplex

- A dedicated switchport is required for each full-duplex node

- The host network card and the switch port must be capable of operating in full-duplex mode

Front 2

The application layer of the TCP/IP uses the ______ protocol?

Back 2

SMTP

Front 3

The transport layer of the TCP/IP uses the _____ protocol?

Back 3

TCP

Front 4

The internet layer of the TCP/IP uses the _____ protocol?

Back 4

IP

Front 5

The network access layer of the TCP/IP uses the _______ protocol?

Back 5

Ethernet

Front 6

Which OSI layer header contains the address of a destination host that is on another network?

Back 6

Network layer

Front 7

Which layer of the TCP/IP stack combines the OSI model physical and data link layers?

Back 7

Network access layer

Front 8

Which protocol uses a connection-oriented service to deliver files between end systems?

Back 8

FTP

Front 9

If the hubs were replaced by switches, what would be virtually eliminated?

Back 9

Ethernet collisions

Front 10

Which network device functions only at Layer 1 of the OSI model?

Back 10

hub

Front 11

Which transport layer protocol provides best-effort delivery service with no acknowledgmentreceipt required?

Back 11

UDP - provides a connectionless datagram service that offers best-effort delivery, which means thatUDP does not guarantee delivery or verify sequencing for any datagrams.

Front 12

Which layer of the OSI model controls the reliability of communications between network devicesusing flow control, sequencing and acknowledgments?

Back 12

Transport

Front 13

Which statements are true regarding ICMP packets? (Choose two.)

Back 13

- TRACERT uses ICMP packets.

- They are encapsulated within IP datagrams.

Front 14

Which statements accurately describe CDP? (Choose three.)

Back 14

-CDP is a Cisco proprietary protocol.

- CDP is a datalink layer protocol.

- CDP can discover directly connected neighboring Cisco devices

Front 15

How does a switch differ from a hub?

Back 15

A switch tracks MAC addresses of directly-connected devices.

Front 16

What must occur before a workstation can exchange HTTP packets with a web server?

Back 16

A TCP connection must be established between the workstation and the web server

Front 17

How does TCP differ from UDP? (Choose two.)

Back 17

- TCP provides synchronized communication.

- TCP provides sequence numbering of packets.

Front 18

A workstation has just resolved a browser URL to the IP address of a server. What protocol willthe workstation now use to determine the destination MAC address to be placed into framesdirected toward the server?

Back 18

ARP

Front 19

Host A is sending a packet to Host B for the first time. What destination MAC address will Host Ause in the ARP request?

Back 19

ff-ff-ff-ff-ff-ff

Front 20

What are two common TCP applications? (Choose two.)

Back 20

- SMTP

- FTP

Front 21

Which two statements describe the operation of the CSMA/CD access method? (Choose two.)

Back 21

- In a CSMA/CD collision domain, stations must wait until the media is not in use beforetransmitting.

- After a collision, all stations run a random backoff algorithm. When the backoff delay period hasexpired, all stations have equal priority to transmit data.

Front 22

On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or fromanother vendor?

Back 22

CDP

Front 23

At which layer of the OSI model does the protocol that provides the information that is displayedby the show cdp neighbors command operate?

Back 23

data link

Front 24

Which two characteristics apply to Layer 2 switches? (Choose two.)

Back 24

- increases the number of collision domains

- implements VLAN

Front 25

Which two characteristics describe the access layer of the hierarchical network design model?(Choose two.)

Back 25

- layer 3 support

- port security

Front 26

Which two options will help to solve the problem of a network that is suffering a broadcast storm?(Choose two.)

Back 26

-a router

- a Layer 3 switch

Front 27

A switch receives a frame on one of its ports. There is no entry in the MAC address table for thedestination MAC address. What will the switch do with the frame?

Back 27

forward it out of all ports except the one that received it

Front 28

Which address type does a switch use to make selective forwarding decisions?

Back 28

destination MAC address

Front 29

What does a host on an Ethernet network do when it is creating a frame and it does not have thedestination address?

Back 29

sends out an ARP request with the destination IP address

Front 30

A switch has 48 ports and 4 VLANs. How many collision and broadcast domains exist on theswitch (collision, broadcast)?

Back 30

48, 4

Front 31

Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.)

Back 31

- 10.1.168.0

-10.1.174.255

- 10.1.160.255

Front 32

Given an IP address of 192.168.1.42 255.255.255.248, what is the subnet address?

Back 32

192.168.1.40/29

Front 33

Which two statements describe the IP address 10.16.3.65/23? (Choose two.)

Back 33

- The lowest host address in the subnet is 10.16.2.1 255.255.254.0

- The broadcast address of the subnet is 10.16.3.255 255.255.254.0

Front 34

Given a Class C IP address subnetted with a /30 subnet mask, how many valid host IP addressesare available on each of the subnets?

Back 34

2 - (/30 CIDR corresponds to mask 55.255.255.252 whose binary is 11111100 whichmeans 6 subnet bits and 2 host bits which means 62 subnets and 2 hosts per subnet)

Front 35

Which one of the following IP addresses is the last valid host in the subnet using mask255.255.255.224?

Back 35

192.168.2.62

Front 36

What is the subnet address of 172.16.159.159/22?

Back 36

172.16.156.0

Front 37

What is the subnet address for the IP address 172.19.20.23/28?

Back 37

172.19.20.16

Front 38

An administrator is working with the 192.168.4.0 network, which has been subnetted with a /26mask. Which two addresses can be assigned to hosts within the same subnet? (Choose two.)

Back 38

- 192.168.4.67

- 192.168.4.125

Front 39

What is the network address for the host with IP address 192.168.23.61/28?

Back 39

192.168.23.48

Front 40

Which three items will adequately fulfill the request? (Choose three)

Back 40

- one IP subnet with a mask of 255.255.254.0

- seven 48-port switches

- one router interface

Front 41

What is the purpose of assigning an IP address to a switch?

Back 41

allows remote management of the switch

Front 42

What two things does a router do when it forwards a packet? (Choose two.)

Back 42

- switches the packet to the appropriate outgoing interfaces

- determines the next hop on the path

Front 43

What does administrative distance refer to?

Back 43

a measure of the trustworthiness of a routing information source

Front 44

Which IOS command is used to initiate a login into a VTY port on a remote router?

Back 44

router# telnet

* VTY ports are telnet ports hence command B will initiate login to the telnet port

Front 45

The command ip route 192.168.100.160 255.255.255.224 192.168.10.2 was issued on a router.No routing protocols or other static routes are configured on the router. Which statement is trueabout this command?

Back 45

- Packets that are destined for host 192.168.100.160 will be sent to 192.168.10.2.

*160 it's actually network address of /27 so any address within the range of 160network will be sent to 192.168.10.2

Front 46

Which two of these functions do routers perform on packets? (Choose two.)

Back 46

- Update the Layer 2 headers of outbound packets with the MAC addresses of the next hops

- Examine the Layer 3 headers of inbound packets and use that information to determine thenext hops for the packets

Front 47

Which two commands will display the current IP address and basic Layer 1 and 2 status of aninterface? (Choose two.)

Back 47

- router#show protocols

- router#show controllers

* Router#show protocols displays status of configured Layer 2 and 3 protocols whileshow controllers Displays statistics for interface hardware including the current IP address

Front 48

An administrator is in the process of changing the configuration of a router. What command willallow the administrator to check the changes that have been made prior to saving the newconfiguration?

Back 48

- Router# show running-config

Front 49

On a live network, which commands will verify the operational status of router interfaces? (Choosetwo.)

Back 49

- Router# show interfaces

- Router# show ip interface brief

Front 50

Which router command will configure an interface with the IP address 10.10.80.1/19?

Back 50

- router(config-if)# ip address 10.10.80.1 255.255.224.0

Front 51

What is the best practice when assigning IP addresses in a small office of six hosts?

Back 51

Assign the addresses statically on each node.

Front 52

Name the protocol:

A PC sends packets to the default gateway IP address the first time since the PC is turned on

Back 52

ARP - Address Resolution Protocol

Front 53

Name the protocol:

The network administrator is checking basic IP connectivity from a workstation to a server

Back 53

ICMP -

Front 54

Name the protocol:

The TCP/IP protocol stack must find an IP address for packets destined for a URL

Back 54

DNS - Domain Name

Front 55

Name the protocol:

A network device will automatically assign IP addresses to workstations

Back 55

DHCP

Front 56

Name the protocol:

A PC with address 10.1.5.10 must access devices on the Internet

Back 56

NAT - Network Address Translation

Front 57

Name the protocol:

Only routers and servers require static IP addresses. Easy IP administration is required

Back 57

DHCP -

Front 58

Name the protocol:

A PC only knows a server as /MediaServer. IP needs to send data to that server.

Back 58

DNS

Front 59

Name the protocol:

A protocol is needed to replace current static routes with automatic route updates

Back 59

OSPF

Front 60

Protocol definitions:

A protocol used to monitor and manage network devices

Back 60

SNMP

Front 61

Protocol definitions:

A reliable, connection-oriented service that uses TCP to transfer files between systems

Back 61

FTP

Front 62

Protocol definitions:

A connectionless service that uses UDP to transfer files between systems

Back 62

TFTP

Front 63

Protocol definitions:

A protocol that converts human-readable names into machine readable addresses

Back 63

DNS

Front 64

Protocol definitions:

Used to assign IP addresses automatically and set parameters such as subnet mask and default gateway

Back 64

DHCP

Front 65

In the configuration of NAT, what does the keyword overload signify?

Back 65

Multiple internal hosts will use one IP address to access external network resources.

Front 66

What happens when computers on a private network attempt to connect to the Internet through aCisco router running PAT?

Back 66

The router uses the same IP address but a different TCP source port number for eachconnection.

*Port Address Translation makes the PC connect to the Internet but using differentTCP source port

Front 67

When configuring NAT, the Internet interface is considered to be what?

Back 67

outside

Front 68

The ip helper-address command does what?

Back 68

relays a DHCP request across networks

Front 69

An administrator has connected devices to a switch and, for security reasons, wants thedynamically learned MAC addresses from the address table added to the running configuration.What must be done to accomplish this?

Back 69

Enable port security and use the keyword sticky

Front 70

A company has placed a networked PC in a lobby so guests can have access to the corporatedirectory. A security concern is that someone will disconnect the directory PC and re-connect theirlaptop computer and have access to the corporate network. For the port servicing the lobby, whichthree configuration steps should be performed on the switch to prevent this? (Choose three.)

Back 70

-Enable port security

-Create the port as an access port

- Statically assign the MAC address to the address table

Front 71

Why would a network administrator configure port security on a switch?

Back 71

to prevent unauthorized hosts from accessing the LAN

Front 72

How can you ensure that only the MAC address of a server is allowed by switch port Fa0/1?

Back 72

Configure the server MAC address as a static entry of port security