Modules 1 -3 Basic Network Connectivity and Communications
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.
Ctrl-Shift-6
Allows the user to interrupt an IOS process such as ping or traceroute
What term describes the ability to use personal devices across a business or campus network?
BYOD
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?
BYOD Bring Your Own Device
How does BYOD change the way in which businesses implement networks?
BYOD provides flexibility in where and how users can access network resources.
What term describes storing personal files on servers over the internet to provide access anywhere, anytime, and on any device?
Cloud
What process involves placing one PDU inside of another PDU?
Encapsulation
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
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 term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?
Extranet
What layer is responsible for routing messages through an internetwork in the TCP/IP model?
Internet
What term describes a private collection of LANs and WANs that belongs to an organization?
Intranet
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 the Internet?
It provides connections through interconnected global networks.
Security example
Protect the network from unauthorized access.
PDU
Protocol Data Unit
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 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 Switch Virtual Interface
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.
ServerB is attempting to contact HostA. Which two statements correctly identify the addressing that ServerB will generate in the process? (Choose two.) Host to switch to router to router to switch to server.
ServerB will generate a frame with the destination MAC address of RouterB.*ServerB will generate a packet with the destination IP address of HostA.
Guidelines for naming conventions on Cisco IOS devices? There are 5.
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
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 Telnet-formatted data is provided to the next layer. The TCP Header is added. The IP header is added. The Ethernet header is added.
An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem? switch1> config t % Invalid input detected at '^' marker.
The administrator must first enter privileged EXEC mode before issuing the command
An administrator is configuring a switch console port with a password. In what order will the administrator travel through the IOS modes of operation in order to reach the mode in which the configuration commands will be entered? 4 Steps. Explain.
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 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.
What are two functions of end devices on a network? (Choose two.)
They originate the data that flows through the network and They are the interface between humans and the communication network
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.
What is the default SVI on a Cisco switch?
VLAN1
An employee wants to access the network of the organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network?
VPN
In which scenario would the use of a WISP be recommended?
a farm in a rural area without wired broadband access
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
Two descriptions of privileged EXEC mode
accessed by entering the enable command and identified by a prompt ending with the # character.
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
Tab Hot Key
completes abbreviated commands and parameters
Which two OSI model layers have the same functionality as a single layer of the TCP/IP model? (Choose two.)
data link and physical
At which OSI layer is a destination MAC address added to a PDU during the encapsulation process?
data link layer
What term describes a technology that allows devices to connect to the LAN using an electrical outlet?
powerline networking
Which type of access is secured on a Cisco router or switch with the enable secret command?
privileged EXEC
? Hot Key
provides content specific help
Up Arrow Hot Key
scrolls backwards through previously entered commands
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 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
Characteristic of dialup telephone
typically has very low bandwidth
What command will prevent all unencrypted passwords from displaying in plain text in a configuration file?
(config)# service password-encryption
Scalability example
Expand the network without degrading the service for existing users.
A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?
Is password after line console 0 command. In this case lineconin
Which statement is true about the running configuration file in a Cisco IOS device?
It affects the operation of the device immediately when modified
What is an ISP?
It is an organization that enables individuals and businesses to connect to the Internet
What are three characteristics of an SVI?
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 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.
Which two statements are true regarding the user EXEC mode?
The device prompt for this mode ends with the ">" symbol. Only some aspects of the router configuration can be viewed
Describe IANA
This organization is responsible for overseeing and managing IP address allocation, domain name management, and protocol identifiers.
Which name is assigned to the physical layer PDU?
bits
Which name is assigned to the application layer PDU?
data
At which OSI layer is a source MAC address added to a PDU during the encapsulation process?
data link layer
Which name is assigned to the data link layer PDU?
frame
What are two characteristics of a scalable network? (Choose two.)
grows in size without impacting existing users and suitable for modular devices that allow for expansion.
Characteristic of DSL
high bandwidth connection that runs over a telephone line
Two descriptions of user EXEC mode
limited number of basic monitoring commands and the first entrance to the CLI of an IOS device
What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
scalability
Which name is assigned to the transport layer PDU?
segment
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
What type of network must a home user access in order to do online shopping?
the Internet
What two criteria are used to help select a network medium from various network media? (Choose two.)
the distance the selected medium can successfully carry a signal and the environment where the selected medium is to be installed
What type of network traffic requires QoS?
video conferencing
Describe ISOC
This organization promotes the open development, evolution, and use of the internet throughout the world.
Space Bar Hot Key
displays the next screen
Characteristic of cable
uses coaxial cable as a medium
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.
What three application layer protocols are part of the TCP/IP protocol suite?
DHCP, DNS, FTP
Fault Tolerance example
Provide redundant links and devices
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
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.
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.
Describe ISO
This organization is the largest developer of international standards in the world for a wide variety of products and services. It is known for the Open Systems Interconnection (ISO) reference model.
At which OSI layer is data added to a PDU during the encapsulation process?
application layer
Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)
cellular and satellite
Two descriptions of global configuration mode
changes made affect the operation of the device as a whole and accessed by entering configure terminal command
What term describes a computing model where server software runs on dedicated computers?
client/server
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.)
console interface and priveleged EXEC mode
Which command or key combination allows a user to return to the previous level in the command hierarchy?
exit
A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber optic cable that connects two of the existing dormitories to the campus data center. Although the cable has been cut, students in the dormitories only experience a very short interruption of network services. What characteristic of the network is shown here?
fault tolerance
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
Which PDU format is used when bits are received from the network medium by the NIC of a host?
frame
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 and installing antivirus software
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
Characteristic of satellite
not suited for heavily wooded areas
Which name is assigned to the network layer PDU?
packet
What term describes a network where one computer can be both client and server?
peer-to-peer
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
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
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
At which OSI layer is a source port number added to a PDU during the encapsulation process?
transport layer
