CCNA 1121 Modules 1-3 Basic Network Connectivity and Communications

What command will prevent all unencrypted passwords from displaying in plain text in a configuration file? (config)# enable password secret (config)# enable secret Secret_Password (config-line)# password secret (config)# service password-encryption (config)# enable secret Encrypted_Password

(config)# service password-encryption To prevent all configured passwords from appearing in plain text in configuration files, an administrator can execute the service password-encryption command. This command encrypts all configured passwords in the configuration file.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. What is the IP address of the switch virtual interface (SVI) on Switch0? 192.168.5.10 192.168.10.5 192.168.10.1 192.168.5.0

192.168.5.10 After the enable command is issued, the show running-configuration command or the show ip interfaces brief command will display the IP address of the switch virtual interface (SVI).

What is an advantage of network devices using open standard protocols? Network communications is confined to data transfers between devices from the same vendor. A client host and a server running different operating systems can successfully exchange data. Internet access can be controlled by a single ISP in each market. Competition and innovation are limited to specific types of products.

A client host and a server running different operating systems can successfully exchange data. An advantage of network devices implementing open standard protocols, such as from the TCP/IP suite, is that clients and servers running different operating systems can communicate with each other. Open standard protocols facilitate innovation and competition between vendors and across markets, and can reduce the occurrence of monopolies in networking markets.

Which statement describes the use of powerline networking technology? New "smart" electrical cabling is used to extend an existing home LAN. A home LAN is installed without the use of physical cabling. A device connects to an existing home LAN using an adapter and an existing electrical outlet. Wireless access points use powerline adapters to distribute data through the home LAN.

A device connects to an existing home LAN using an adapter and an existing electrical outlet. Powerline networking adds the ability to connect a device to the network using an adapter wherever there is an electrical outlet.​ The network uses existing electrical wiring to send data. It is not a replacement for physical cabling, but it can add functionality in places where wireless access points cannot be used or cannot reach devices.​

What term describes the ability to use personal devices across a business or campus network? BYOD internet intranet extranet

BYOD

What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.) ARP DHCP DNS FTP NAT PPP

DHCP DNS FTP DNS, DHCP, and FTP are all application layer protocols in the TCP/IP protocol suite. ARP and PPP are network access layer protocols, and NAT is an internet layer protocol in the TCP/IP protocol suite.

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 HTTP, TCP, IP, Ethernet Ethernet, TCP, IP, HTTP HTTP, Ethernet, IP, TCP

Ethernet, IP, TCP, HTTP 1. HTTP governs the way that a web server and client interact.2. TCP manages individual conversations between web servers and clients.3. IP is responsible for delivery across the best path to the destination.4. Ethernet takes the packet from IP and formats it for transmission.

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. Delete the vlan.dat file and reboot the device. Close and reopen the terminal emulation software. Issue the copy startup-config running-config command

Issue the reload command without saving the running configuration. 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.

What function does pressing the Tab key have when entering a command in IOS? It aborts the current command and returns to configuration mode. It exits configuration mode and returns to user EXEC mode. It moves the cursor to the beginning of the next line. It completes the remainder of a partially typed word in a command.

It completes the remainder of a partially typed word in a command. Pressing the Tab key after a command has been partially typed will cause the IOS to complete the rest of the command.

What are three characteristics of an SVI? (Choose three.) It is designed as a security protocol to protect switch ports. It is not associated with any physical interface on a switch. It is a special interface that allows connectivity by different types of media. It is required to allow connectivity by any device at any location. It provides a means to remotely manage a switch. It is associated with VLAN1 by default.

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. 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

Which two host names follow the guidelines for naming conventions on Cisco IOS devices? (Choose two.) Branch2! RM-3-Switch-2A4 Floor(15) HO Floor 17 SwBranch799

RM-3-Switch-2A4 SwBranch799 Some guidelines for naming conventions are that names should:Start with a letterContain no spacesEnd with a letter or digitUse only letters, digits, and dashesBe less than 64 characters in length

What term describes a type of network used by people who work from home or from a small remote office? SOHO network BYOD quality of service converged network

SOHO network

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

SOHO network

How is SSH different from Telnet? SSH makes connections over the network, whereas Telnet is for out-of-band access. SSH provides security to remote sessions by encrypting messages and using user authentication. Telnet is considered insecure and sends messages in plaintext. SSH requires the use of the PuTTY terminal emulation program. Tera Term must be used to connect to devices through the use of Telnet. SSH must be configured over an active network connection, whereas Telnet is used to connect to a device from a console connection.

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

A technician configures a switch with these commands: SwitchA(config)# interface vlan 1SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0SwitchA(config-if)# no shutdown What is the technician configuring? Telnet access SVI password encryption physical switchport access

SVI 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 statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network? Data is sent from the internet layer to the network access layer. Packets are sent from the network access layer to the transport layer. Segments are sent from the transport layer to the internet layer. Frames are sent from the network access layer to the internet layer

Segments are sent from the transport layer to the internet layer. When the data is traveling from the PC to the network, the transport layer sends segments to the internet layer. The internet layer sends packets to the network access layer, which creates frames and then converts the frames to bits. The bits are released to the network media.

What are two characteristics of RAM on a Cisco device? (Choose two.) RAM provides nonvolatile storage. The configuration that is actively running on the device is stored in RAM. The contents of RAM are lost during a power cycle. RAM is a component in Cisco switches but not in Cisco routers. RAM is able to store multiple versions of IOS and configuration files

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

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 stored in flash memory. The new configuration will be loaded if the switch is restarted. The current IOS file will be replaced with the newly configured file. The configuration changes will be removed and the original configuration will be restored.

The new configuration will be loaded if the switch is restarted. With the copy running-config startup-config command, the content of the current operating configuration replaces the startup configuration file stored in NVRAM. The configuration file saved in NVRAM will be loaded when the device is restarted.

What is a characteristic of multicast messages? They are sent to a select group of hosts. They are sent to all hosts on a network. They must be acknowledged. They are sent to a single destination

They are sent to a select group of hosts. Multicast is a one-to-many type of communication. Multicast messages are addressed to a specific multicast group.

Which statement is correct about network protocols? Network protocols define the type of hardware that is used and how it is mounted in racks. They define how messages are exchanged between the source and the destination. They all function in the network access layer of TCP/IP. They are only required for exchange of messages between devices on remote networks.

They define how messages are exchanged between the source and the destination. Network protocols are implemented in hardware, or software, or both. They interact with each other within different layers of a protocol stack. Protocols have nothing to do with the installation of the network equipment. Network protocols are required to exchange information between source and destination devices in both local and remote networks.

A network administrator enters the service password-encryption command into the configuration mode of a router. What does this command accomplish? This command encrypts passwords as they are transmitted across serial WAN links. This command prevents someone from viewing the running configuration passwords. This command enables a strong encryption algorithm for the enable secret password command. This command automatically encrypts passwords in configuration files that are currently stored in NVRAM. This command provides an exclusive encrypted password for external service personnel who are required to do router maintenance.

This command prevents someone from viewing the running configuration passwords. The startup-config and running-config files display most passwords in plaintext. Use the service password-encryption global config command to encrypt all plaintext passwords in these files.

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 Ethernet interface boot IOS mode privileged EXEC mode router configuration mode

VTY interface console interface privileged EXEC mode 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.

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

a keyword The first part of the syntax, show , is the command, and the second part of the syntax, running-config, is the keyword. The keyword specifies what should be displayed as the output of the show command.

Which device performs the function of determining the path that messages should take through internetworks? a router a firewall a web server a DSL modem

a router A router is used to determine the path that the messages should take through the network. A firewall is used to filter incoming and outgoing traffic. A DSL modem is used to provide Internet connection for a home or an organization.

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 the Internet an extranet a local area network

an intranet. 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.

At which OSI layer is data added to a PDU during the encapsulation process? application layer data link layer network layer transport layer

application layer

At which OSI layer is data added to a PDU during the encapsulation process? application layer transport layer network layer presentation layer

application layer

What term describes a computing model where server software runs on dedicated computers? client/server internet intranet extranet

client/server

What term describes storing personal files on servers over the internet to provide access anywhere, anytime, and on any device? cloud BYOD quality of service converged network

cloud

Which two OSI model layers have the same functionality as a single layer of the TCP/IP model? (Choose two.) data link network physical session transport

data link physical The OSI data link and physical layers together are equivalent to the TCP/IP network access layer. The OSI transport layer is functionally equivalent to the TCP/IP transport layer, and the OSI network layer is equivalent to the TCP/IP internet layer. The OSI application, presentation, and session layers are functionally equivalent to the application layer within the TCP/IP model.

At which OSI layer is a destination MAC address added to a PDU during the encapsulation process? data link layer transport layer application layer network layer

data link layer

At which OSI layer is a source MAC address added to a PDU during the encapsulation process? data link layer application layer transport layer presentation layer

data link layer

What process involves placing one PDU inside of another PDU? encapsulation encoding segmentation flow control

encapsulation When a message is placed inside of another message, this is known as encapsulation. On networks, encapsulation takes place when one protocol data unit is carried inside of the data field of the next lower protocol data unit.

Which command or key combination allows a user to return to the previous level in the command hierarchy? end exit Ctrl-Z Ctrl-C

exit 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 term describes a network owned by one organization that provides safe and secure access to individuals who work for a different organization? extranet cloud BYOD quality of service

extranet

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

flow control In order for two computers to be able to communicate effectively, there must be a mechanism that allows both the source and destination to set the timing of the transmission and receipt of data. Flow control allows for this by ensuring that data is not sent too fast for it to be received properly.

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

frame When received at the physical layer of a host, the bits are formatted into a frame at the data link layer. A packet is the PDU at the network layer. A segment is the PDU at the transport layer. A file is a data structure that may be used at the application layer.

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 a wireless network installing antivirus software implementing an intrusion detection system adding a dedicated intrusion prevention device

implementing a firewall installing antivirus software Technically complex security measures such as intrusion prevention and intrusion prevention systems are usually associated with business networks rather than home networks. Installing antivirus software, antimalware software, and implementing a firewall will usually be the minimum requirements for home networks. Installing a home wireless network will not improve network security, and will require further security actions to be taken.

What layer is responsible for routing messages through an internetwork in the TCP/IP model? internet transport network access session

internet The TCP/IP model consists of four layers: application, transport, internet, and network access. Of these four layers, it is the internet layer that is responsible for routing messages. The session layer is not part of the TCP/IP model but is rather part of the OSI model.

What term describes a private collection of LANs and WANs that belongs to an organization? intranet internet extranet peer-to-peer

intranet

At which OSI layer is a destination IP address added to a PDU during the encapsulation process? network layer application layer transport layer presentation layer

network layer

At which OSI layer is a source IP address added to a PDU during the encapsulation process? network layer data link layer transport layer application layer

network layer

At which OSI layer is a source IP address added to a PDU during the encapsulation process? network layer data link layer application layer presentation layer

network layer

At which layer of the OSI model would a logical address be added during encapsulation? physical layer data link layer network layer transport layer

network layer Logical addresses, also known as IP addresses, are added at the network layer. Physical addresses are edded at the data link layer. Port addresses are added at the transport layer. No addresses are added at the physical layer.

What term describes a network where one computer can be both client and server? peer-to-peer cloud BYOD quality of service

peer-to-peer

What term describes a technology that allows devices to connect to the LAN using an electrical outlet? powerline networking internet intranet extranet

powerline networking

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 internet intranet extranet

quality of service

Which method allows a computer to react accordingly when it requests data from a server and the server takes too long to respond? encapsulation flow control access method response timeout

response timeout If a computer makes a request and does not hear a response within an acceptable amount of time, the computer assumes that no answer is coming and reacts accordingly.

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? fault tolerance scalability security Quality of Service (QoS) reliability

security 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.

Which name is assigned to the transport layer PDU? bits data frame packet segment

segment Application data is passed down the protocol stack on its way to be transmitted across the network media. During the process, various protocols add information to it at each level. At each stage of the process, a PDU (protocol data unit) has a different name to reflect its new functions. The PDUs are named according to the protocols of the TCP/IP suite: Data - The general term for the PDU used at the application layer.Segment - transport layer PDUPacket - network layer PDUFrame - data link layer PDUBits - A physical layer PDU used when physically transmitting data over the medium

What command is used to verify the condition of the switch interfaces, including the status of the interfaces and a configured IP address? ipconfig ping traceroute show ip interface brief

show ip interface brief 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

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? DNS server address subnet mask default gateway DHCP server address

subnet mask There are several components that need to be entered when configuring IPv4 for an end device: IPv4 address - uniquely identifies an end device on the networkSubnet mask - determines the network address portion and host portion for an IPv4 addressDefault gateway - the IP address of the router interface used for communicating with hosts in another networkDNS server addres s - the IP address of the Domain Name System (DNS) serverDHCP server address (if DHCP is used) is not configured manually on end devices. It will be provided by a DHCP server when an end device requests an IP address.

What two criteria are used to help select a network medium from various network media? (Choose two.) the types of data that need to be prioritized the cost of the end devices utilized in the network the distance the selected medium can successfully carry a signal the number of intermediate devices installed in the network the environment where the selected medium is to be installed

the distance the selected medium can successfully carry a signal the environment where the selected medium is to be installed 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.

Which interface allows remote management of a Layer 2 switch? the AUX interface the console port interface the switch virtual interface the first Ethernet port interface

the switch virtual interface In a Layer 2 switch, there is a switch virtual interface (SVI) that provides a means for remotely managing the device.

Why would a Layer 2 switch need an IP address? to enable the switch to send broadcast frames to attached PCs to enable the switch to function as a default gateway to enable the switch to be managed remotely to enable the switch to receive frames from attached PCs

to enable the switch to be managed remotely A switch, as a Layer 2 device, does not need an IP address to transmit frames to attached devices. However, when a switch is accessed remotely through the network, it must have a Layer 3 address. The IP address must be applied to a virtual interface rather than to a physical interface. Routers, not switches, function as default gateways.

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 restart the ping process to interrupt the ping process to exit to a different configuration mode to allow the user to complete the command

to interrupt the ping process 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.

At which OSI layer is a destination port number added to a PDU during the encapsulation process? transport layer data link layer network layer application layer

transport layer

At which OSI layer is a source port number added to a PDU during the encapsulation process? transport layer application layer network layer presentation layer

transport layer

At which OSI layer is a source port number added to a PDU during the encapsulation process? transport layer network layer application layer data link layer

transport layer

What type of network traffic requires QoS? email on-line purchasing video conferencing wiki

video conferencing Video conferencing utilizes real-time audio and video communications. Both of these are time-sensitive and bandwidth-intensive forms of communication that require quality of service to be active on the network. QoS will ensure an uninterrupted user experience.