Modules 1-3
bring your own device
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? cloud computing online collaboration bring your own device video conferencing
This command prevents someone from viewing the running configuration passwords. Explanation: 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.
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.
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.
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? *Telnet access *SVI *password encryption *physical switchport access
implementing a firewall installing antivirus software Explanation: 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.
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
to interrupt the ping process
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
an intranet
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
Data Link Layer
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
transport layer
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
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 OSI layer is a source IP address added to a PDU during the encapsulation process? network layer data link layer transport layer application 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
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 data link layer
application layer
At which OSI layer is data added to a PDU during the encapsulation process? application layer data link layer network layer transport 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
spyware
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? DoS attack identity theft spyware zero-day attack
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.
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 completes the remainder of a partially typed word in a command.
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.
internet Explanation: 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 layer is responsible for routing messages through an internetwork in the TCP/IP model? internet transport network access session
flow control
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
encapsulation
What process involves placing one PDU inside of another PDU? encapsulation encoding segmentation flow control
security
What protects the network from unauthorized access? scalability fault tolerance security
fault tolerance
What provides redundant links and devices? fault tolerance scalability security
client/server
What term describes a computing model where server software runs on dedicated computers? client/server internet intranet extranet
extranet
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
peer-to-peer
What term describes a network where one computer can be both client and server? peer-to-peer cloud BYOD quality of service
quality of service
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
powerline networking
What term describes a technology that allows devices to connect to the LAN using an electrical outlet? powerline networking internet intranet extranet
cloud
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
DHCP DNS FTP Explanation: 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.
What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.) ARP DHCP DNS FTP NAT PPP
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.
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
response timeout
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
segment
Which name is assigned to the transport layer PDU? bits data frame packet segment
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.
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.
to enable the switch to be managed remotely to enable the switch to receive frames from attached PCs Explanation: 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.
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
1. The Telnet-formatted data is provided to the next layer. 2. The TCP header is added 3. The IP header is added. 4. The Ethernet header is added
For the TCP/IP protocol suite, what is the correct order of events when a Telnet message is being prepared to be sent over the network? The IP Header is Added The TCP Header is Added The Ethernet Header is Added The Telnet-formatted data is provided to the next layer
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.
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
Ethernet, IP, TCP, HTTP Explanation: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.
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
The new configuration will be loaded if the switch is restarted.
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.
SSH provides security to remote sessions by encrypting messages and using user authentication. Telnet is considered insecure and sends messages in plaintext.
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.
a keyword Explanation: 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.
In the show running-config command, which part of the syntax is represented by running-config? the command a keyword a variable a prompt
scalability
What expands the network without degrading the service for existing users? fault tolerance scalability security
VTY interface console interface privileged EXEC mode
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
show ip interface brief
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
The configuration that is actively running on the device is stored in RAM. The contents of RAM are lost during a power cycle.
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.
They are sent to a select group of hosts.
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.
It is an organization that enables individuals and businesses to connect to the Internet.
What is an ISP? *It is a standards body that develops cabling and wiring standards for networking. *It is a protocol that establishes how computers within a local network communicate. *It is an organization that enables individuals and businesses to connect to the Internet. *It is a networking device that combines the functionality of several different networking devices in one.
A client host and a server running different operating systems can successfully exchange data.
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.
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 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
video conferencing
What type of network traffic requires QoS? email on-line purchasing video conferencing wiki
subnet mask
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
DSL
Which Internet connectivity type has high bandwidth connection that runs over telephone lines? DSL Dial up telephone Satellite Cable
Satellite
Which Internet connectivity type is not suited for heavily wooded areas? DSL Dial up telephone Satellite Cable
Dial up telephone
Which Internet connectivity type typically has very low bandwidth? DSL Dial up telephone Satellite Cable
Cable
Which Internet connectivity type uses coaxial cable as a medium? DSL Dial up telephone Satellite Cable
frame
Which PDU format is used when bits are received from the network medium by the NIC of a host? file frame packet segment
a router Explanation: 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.
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
Segments are sent from the transport layer to the internet layer.
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.
A device connects to an existing home LAN using an adapter and an existing electrical outlet.
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.
They define how messages are exchanged between the source and the destination.
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.
extranet
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators? Internet intranet extranet extendednet
data link physical Explanation: 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.
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
