A Practice Quiz For The CCENT Certification Exam

50 Questions | By Rodney.butler | Last updated: Jan 4, 2021 | Total Attempts: 3058

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A Practice Quiz For The CCENT Certification Exam

Questions and Answers

1.

Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)

Discuss
- A.
  
  The UDP destination port number identifies the application or service on the server which will handle the data.
- B.
  
  TCP is the preferred protocol when a function requires lower network overhead.
- C.
  
  UDP segments are encapsulated within IP packets for transport across the network.
- D.
  
  The source port field identifies the running application or service that will handle data returning to the PC.
- E.
  
  The TCP source port number identifies the sending host on the network.
2.

In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)
- A.
  
  When applications need to guarantee that a packet arrives intact, in sequence, and unduplicated
- B.
  
  When a faster delivery mechanism is needed
- C.
  
  When delivery overhead is not an issue
- D.
  
  When applications do not need to guarantee delivery of the data
- E.
  
  When destination port numbers are dynamic
3.

Refer to the exhibit. Workstation A sends an IP packet to workstation B. Which two statements describe the encapsulation of the packet as it passes through the network?
- A.
  
  The Layer 2 header is stripped from the packet by each router.
- B.
  
  The destination Layer 2 address of the packet does not change.
- C.
  
  The source Layer 3 address of the packet changes at each router.
- D.
  
  The Layer 2 header changes at each router.
- E.
  
  The Layer 3 header is stripped from the packet by each router.
4.

Refer to the exhibit. A switch with a default configuration connects four hosts. The ARP table for host A is shown. What happens when host A wants to send an IP packet to host D?
- A.
  
  Host A sends an ARP request to the MAC address of host D.
- B.
  
  Host D sends an ARP request to host A.
- C.
  
  Host A sends out the packet to the switch. The switch sends the packet only to the host D, which in turn responds.
- D.
  
  Host A sends out a broadcast of FF:FF:FF:FF:FF:FF. Every other host connected to the switch receives the broadcast and host D responds with its MAC address.
5.

What three services are provided by the transport layer? (Choose three.)
- A.
  
  Flow control
- B.
  
  Encryption of data
- C.
  
  Path determination
- D.
  
  Connection establishment
- E.
  
  Error recovery
6.

Which layer of the OSI model handles the process of identifying and discarding damaged frames?
- A.
  
  Presentation
- B.
  
  Session
- C.
  
  Transport
- D.
  
  Network
- E.
  
  Data link
7.

Refer to the exhibit. Considering the information that follows and the exhibit, where is the data flowing? Source IP address: 192.168.1.88 Destination IP address: 209.165.200.225Source MAC address: 00-11-12-7a-41-10Destination MAC address: 00-0d-cc-f4-ad-2cSource Port: 1464Destination Port: 23
- A.
  
  A – from laptop to access point
- B.
  
  B – from access point to attached switch
- C.
  
  C – from host to default gateway router
- D.
  
  D – from router to ISP
8.

Refer to the exhibit. If Host 1 needs to request its IP address from the server, what protocol would be used to process that request?
- A.
  
  CSMA/CD
- B.
  
  CSMA/CA
- C.
  
  DHCP
- D.
  
  ICMP
- E.
  
  FTP
9.

Refer to the exhibit. If Host 1 were to transfer a file to the server, what layers of the TCP/IP model would be used?
- A.
  
  Only application and Internet layers
- B.
  
  Only Internet and network access layers
- C.
  
  Only application, Internet, and network access layers
- D.
  
  Application, transport, Internet, and network access layers
- E.
  
  Only application, transport, network, data link, and physical layers
10.

ABC company needs to connect its router to an ISP to access the Internet. What device is needed to connect the router to the ISP if the ISP supplies a T1 leased line for the connection?
- A.
  
  CSU/DSU
- B.
  
  Modem
- C.
  
  DSL router
- D.
  
  NT1 device
- E.
  
  ISDN modem
11.

Refer to the exhibit. How many collision domains exist in the exhibited network?
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  6
- E.
  
  7
12.

What are two actions performed by a Cisco switch? (Choose two.)

Discuss
- A.
  
  Building a routing table that is based on the first IP address in the frame header
- B.
  
  Using the source MAC addresses of frames to build and maintain a MAC address table
- C.
  
  Forwarding frames with unknown destination IP addresses to the default gateway
- D.
  
  Utilizing the MAC address table to forward frames via the destination MAC address
- E.
  
  Examining the destination MAC address to add new entries to the MAC address table
13.

A network administrator wants to configure a Cisco 2960 switch so that access to each switch port is limited to one MAC address. What will accomplish the administrator’s objective?
- A.
  
  Cisco Discovery Protocol
- B.
  
  Port security
- C.
  
  Internet Control Message Protocol
- D.
  
  Access lists
- E.
  
  Flow control
14.

When would you want to use the switchport port-security mac-address sticky command?
- A.
  
  Whenever you need to protect an unused switch port
- B.
  
  Whenever you want the port to only allow a single host device to connect
- C.
  
  Whenever you need the port to recognize the statically assigned MAC address in the MAC address table
- D.
  
  Whenever multiple devices share the same port
15.

Refer to the exhibit. Switch1 has only the following commands added to a default Cisco 2960 configuration: enable secret cisco line vty 0 4 password Kn0ckkn-cK login interface vlan 1 ip address 10.0.1.8 255.255.255.0 no shutdown Assume that routing between networks is functioning properly and that Switch2 has been properly configured for remote access. What would the result be if the telnet 10.0.2.2 command is issued from Switch1 privileged mode?
- A.
  
  The following prompt would appear: User Access Verification Password:
- B.
  
  Switch2 would return a destination unreachable message to Switch1.
- C.
  
  Router1 would return a destination unreachable message to Switch1.
- D.
  
  The packet would be dropped.
16.

When configuring a switch to use SSH for virtual terminal connections, what is the purpose of the crypto key generate rsa command?
- A.
  
  Show SSH connected hosts
- B.
  
  Disconnect SSH connected hosts
- C.
  
  Create a public and private key pair
- D.
  
  Show active SSH ports on the switch
- E.
  
  Access the SSH database configuration
17.

Which three statements are true about full-duplex operation on an Ethernet network? (Choose three.)
- A.
  
  There are no collisions in full-duplex mode.
- B.
  
  A dedicated switch port is required for each node.
- C.
  
  Hub ports are preconfigured for full-duplex mode.
- D.
  
  The host network card must detect the availability of the media before transmitting.
- E.
  
  The host network card and the switch port must both be in full-duplex mode.
18.

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

Discuss
- A.
  
  Devices can be configured with a higher transmission priority.
- B.
  
  A jam signal indicates that the collision has cleared and the media is not busy.
- C.
  
  A device listens and waits until the media is not busy before transmitting.
- D.
  
  All of the devices on a segment see data that passes on the network medium.
- E.
  
  After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
19.

Reference place holder.. Choose Answer C...
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
- E.
  
  E
20.

Which three addresses are valid public addresses? (Choose three.)
- A.
  
  198.133.219.17
- B.
  
  192.168.1.245
- C.
  
  10.15.250.5
- D.
  
  128.107.12.117
- E.
  
  64.104.78.227
21.

Refer to the exhibit. Four hosts are being added to the 172.16.112.0 network. Which IP address is invalid as a host address for this network?
- A.
  
  172.16.113.55
- B.
  
  172.16.112.255
- C.
  
  172.16.127.255
- D.
  
  172.16.112.89
- E.
  
  172.16.120.96
22.

Refer to the exhibit. Using PAT, RouterA is configured to translate all private inside addresses to a single public address. The network administrator wants to determine which port number is being used in the translation of the ComputerA inside private IP address. Which command could be used if the administrator sits at ComputerA but is not allowed remote access to RouterA?
- A.
  
  Ipconfig /all
- B.
  
  Traceroute
- C.
  
  Netstat
- D.
  
  Tracert
23.

What type of address is 172.16.134.64 with the subnet mask 255.255.255.224?
- A.
  
  This is a usable host address.
- B.
  
  This is a broadcast address.
- C.
  
  This is a network address.
- D.
  
  This is an Internet-routable address.
24.

The router reads each bit to determine the class of an address. Which three series of binary numbers would the router identify as public Class C addresses? (Choose three.)
- A.
  
  10101100.00100000.00010001.00010111
- B.
  
  11000110.10000101.11011011.01010111
- C.
  
  11010001.10100101.11001000.11101101
- D.
  
  11000000.10101000.00100000.01000000
- E.
  
  11000000.00011111.00000111.10111011
25.

Given a host with the IP address 192.168.65.54 and a subnet mask of 255.255.255.240, to which network does the host belong?
- A.
  
  192.168.65.16
- B.
  
  192.168.65.32
- C.
  
  192.168.65.48
- D.
  
  192.168.65.64