CCNA Modules 1-3

What is an advantage of network devices using open standard protocols?

A client host and a server running different operating systems can successfully exchange data

Which statement describes the use of power line networking technology?

A device connects to an existing home LAN using an adapter and an existing electrical outlet.

While trying to solve a network issue, a technician made multiple changes to the current router configuration file. The changes did not solve the problem and were not saved. What action can the technician take to discard the changes and work with the file in NVRAM?

Issue the reload command without saving the running configuration

What term describes a type of network used by people who work from home or from a small remote office?

SOHO network

How is SSH different from Telnet?

SSH provides security to remote sessions by encrypting messages and using user authentication. Telnet is considered insecure and sends messages in plaintext.

A networking technician is working on the wireless network at a medical clinic. The technician accidentally sets up the wireless network so that patients can see the medical records data of other patients. Which of the four network characteristics has been violated in this situation?

Security

Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?

Segments are sent from the transport layer to the internet layer

In the show running-config command, which part of the syntax is represented by running-config?

a keyword

Which device performs the function of determining the path that messages should take through internetworks?

a router

An employee at a branch office is creating a quote for a customer. In order to do this, the employee needs to access confidential pricing information from internal servers at the Head Office. What type of network would the employee access?

an intranet

What process involves placing one PDU inside of another PDU?

encapsulation

What term describes a network owned by one organization that provides safe and secure access to individuals who work for a different organization?

extranet

Which method allows a computer to react accordingly when it requests data from a server and the server takes too long to respond?

response timeout

Which name is assigned to the transport layer PDU?

segment

What command will prevent all unencrypted passwords from displaying in plain text in a configuration file?

service password-encryption

What command is used to verify the condition of the switch interfaces, including the status of the interfaces and a configured IP address?

show IP interface brief

During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. Which type of threat is affecting this computer?

spyware

When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?

subnet mask

Which interface allows remote management of a Layer 2 switch?

the switch virtual interface

Why would a Layer 2 switch need an IP address?

to enable the switch to be managed remotely

An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?

to interrupt the ping process

At which OSI layer is a destination port number added to a PDU during the encapsulation process?

transport layer

What type of network traffic requires QoS?

video conferencing

Which PDU format is used when bits are received from the network medium by the NIC of a host?

Frame

Fault Tolerance

Provides redundant links and devices

What three application layer protocols are part of the TCP/IP protocol suite?

DHCP DNS FTP

A web client is receiving a response for a web page from a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to decode the received transmission?

Ethernet, IP, TCP, HTTP

Which command or key combination allows a user to return to the previous level in the command hierarchy?

Exit

Scalability

Expands the network without degrading the service for existing users

Which term refers to a network that provides secure access to the corporate offices by suppliers, customers, and collaborators?

Extranet

What function does pressing the Tab key have when entering a command in IOS?

It completes the remainder of a partially typed word in a command

What is an ISP?

It is an organization that enables individuals and businesses to connect to the Internet.

Security

Protects the network from unauthorized access

What are two characteristics of RAM on a Cisco device?

The configuration that is actively running on the device is stored in RAM. The contents of RAM are lost during a power cycle.

After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?

The new configuration will be loaded if the switch is restarted

What is a characteristic of multicast messages?

They are sent to a select group of hosts

Which statement is correct about network protocols?

They define how messages are exchanged between the source and the destination

A network administrator enters the service password-encryption command into the configuration mode of a router. What does this command accomplish?

This command prevents someone from viewing the running configuration passwords

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.

VTY interface console interface privileged EXEC mode

At which OSI layer is data added to a PDU during the encapsulation process

application layer

A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?

bring your own device

What term describes a computing model where server software runs on dedicated computers?

client/server

What term describes storing personal files on servers over the internet to provide access anywhere, anytime, and on any device?

cloud

Which two OSI model layers have the same functionality as a single layer of the TCP/IP model?

data link and physical

At which OSI layer is a source MAC address added to a PDU during the encapsulation process?

data link layer

What term describes a policy that allows network devices to manage the flow of data to give priority to voice and video?

quality of service

What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?

flow control

A user is implementing security on a small office network. Which two actions would provide the minimum security requirements for this network?

implementing a firewall and installing antivirus software

What layer is responsible for routing messages through an internetwork in the TCP/IP model?

internet

At which OSI layer is a source IP address added to a PDU during the encapsulation process?

network layer

At which layer of the OSI model would a logical address be added during encapsulation?

network layer

What term describes a network where one computer can be both client and server?

peer-to-peer

What term describes a technology that allows devices to connect to the LAN using an electrical outlet?

power line networking