CCNA1 Modules 1-3 Basic Network Connectivity and Communications Flashcards
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
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?
extranet
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 is an ISP?
It is an organization that enables individuals and businesses to connect to the Internet.
Protect the network from unauthorized access.
Provide redundant links and devices.
Expand the network without degrading the service for existing users.
Security
Fault Tolerance
Scalability
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
Explanation: Intranet is a term used to refer to a private connection of LANs and WANs that belongs to an organization. An intranet is designed to be accessible only by the organization’s members, employees, or others with authorization.
Which statement describes the use of powerline networking technology?
A device connects to an existing home LAN using an adapter and an existing electrical outlet.
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
Explanation: Network security includes protecting the confidentiality of data that is on the network. In this case, because confidential data has been made available to unauthorized users, the security characteristic of the network has failed.
not suited for heavily wooded areas
uses coaxial cable as a medium
typically has vey low bandwidth
high bandwidth connection that runs over telephone line
satellite
cable
dialup telephone
DSL
Explanation: DSL is an always-on, high bandwidth connection that runs over telephone lines. Cable uses the same coaxial cable that carries television signals into the home to provide Internet access. Dialup telephone is much slower than either DSL or cable, but is the least expensive option for home users because it can use any telephone line and a simple modem. Satellite requires a clear line of sight and is affected by trees and other obstructions. None of these typical home options use dedicated leased lines such as T1/E1 and T3/E3.
What two criteria are used to help select a network medium from various network media?
the distance the selected medium can successfully carry a signal
the environment where the selected medium is to be installed
Explanation: Criteria for choosing a network medium are the distance the selected medium can successfully carry a signal, the environment in which the selected medium is to be installed, the amount of data and the speed at which the data must be transmitted, and the cost of the medium and its installation.
What type of network traffic requires QoS?
video conferencing
A user is implementing security on a small office network. Which two actions would provide the minimum security requirements for this network? (Choose two.)
implementing a firewall
installing antivirus software
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
Explanation: Access to the VTY and console interfaces can be restricted using passwords. Out-of-band management of the router can be restricted in both user EXEC and privileged EXEC modes.
Which interface allows remote management of a Layer 2 switch?
the switch virtual interface
Explanation: In a Layer 2 switch, there is a switch virtual interface (SVI) that provides a means for remotely managing the device.
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.
Explanation: Pressing the Tab key after a command has been partially typed will cause the IOS to complete the rest of the command.
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.
Explanation: The technician does not want to make any mistakes trying to remove all the changes that were done to the running configuration file. The solution is to reboot the router without saving the running configuration. The copy startup-config running-config command does not overwrite the running configuration file with the configuration file stored in NVRAM, but rather it just has an additive effect.
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
Explanation: To interrupt an IOS process such as ping or traceroute, a user enters the Ctrl-Shift-6 key combination. Tab completes the remainder of parameters or arguments within a command. To exit from configuration mode to privileged mode use the Ctrl-Z keystroke. CTRL-R will redisplay the line just typed, thus making it easier for the user to press Enter and reissue the ping command.
A technician configures a switch with these commands:
SwitchA(config)# interface vlan 1
SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0
SwitchA(config-if)# no shutdown
What is the technician configuring?
SVI
Explanation: For a switch to have an IP address, a switch virtual interface must be configured. This allows the switch to be managed remotely over the network.
Which command or key combination allows a user to return to the previous level in the command hierarchy?
exit
Explanation: End and CTRL-Z return the user to the privileged EXEC mode. Ctrl-C ends a command in process. The exit command returns the user to the previous level.
What are two characteristics of RAM on a Cisco device? (Choose two.)
The configuration that is actively running on the device is stored in RAM.
The contents of RAM are lost during a power cycle.
Explanation: RAM stores data that is used by the device to support network operations. The running configuration is stored in RAM. This type of memory is considered volatile memory because data is lost during a power cycle. Flash memory stores the IOS and delivers a copy of the IOS into RAM when a device is powered on. Flash memory is nonvolatile since it retains stored contents during a loss of power.
Which two host names follow the guidelines for naming conventions on Cisco IOS devices? (Choose two.)
RM-3-Switch-2A4
SwBranch799
Explanation: Some guidelines for naming conventions are that names should: Start with a letter Contain no spaces End with a letter or digit Use only letters, digits, and dashes Be less than 64 characters in length
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.
Explanation: SSH is the preferred protocol for connecting to a device operating system over the network because it is much more secure than Telnet. Both SSH and Telnet are used to connect to devices over the network, and so are both used in-band. PuTTY and Terra Term can be used to make both SSH and Telnet connections.
first mode
second mode
third mode
final mode
user EXEC mode
privileged EXEC mode
global configuration mode
user EXEC mode
Explanation: The configuration mode that the administrator first encounters is user EXEC mode. After the enable command is entered, the next mode is privileged EXEC mode. From there, the configure terminal command is entered to move to global configuration mode. Finally, the administrator enters the line console 0 command to enter the mode in which the configuration will be entered.
What are three characteristics of an SVI? (Choose three.)
It is not associated with any physical interface on a switch.
It provides a means to remotely manage a switch.
It is associated with VLAN1 by default.
Explanation: Switches have one or more switch virtual interfaces (SVIs). SVIs are created in software since there is no physical hardware associated with them. Virtual interfaces provide a means to remotely manage a switch over a network that is using IP. Each switch comes with one SVI appearing in the default configuration “out-of-the-box.” The default SVI interface is VLAN1.
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
Explanation: The show ip interface brief command is used to display a brief synopsis of the condition of the device interfaces. The ipconfig command is used to verify TCP/IP properties on a host. The ping command is used to verify Layer 3 connectivity. The traceroute command is used to trace the network path from source to destination.
limited number of basic monitoring commands
the first entrance into the CLI of an IOS device
user EXEC mode
accessed by entering the enable command
identified by a prompt ending with the # character
privileged EXEC mode
changes made affect the operation of the device as a whole
accessed by entering the configure terminal command
global configuration mode
