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CISCO CCNA Semester 1: Introduction to Networks > Chapter 2.3: Configuring a Network Operating System: Address Schemes > Flashcards

Chapter 2.3: Configuring a Network Operating System: Address Schemes Flashcards

1
Q

What is the primary means that enables devices to locate one another and establish end-to-end communication on the Internet?
2.3.1.1

A

IPv4 or IPv6. IP addresses are essential for devices to communicate from source to destination and back in any internetwork.

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2
Q

On a network, what must be configured with IP addresses? List examples.

A

End devices must be configured with IP addresses.
Computers, network printers, VoIP phones, security cameras, smart phones, Mobile handheld devices (wireless barcode scanners etc)

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3
Q

What is the structure of an IPv4 address and how is it represented?

A

Dotted decimal notation.

It is represented with four decimal numbers between 0 and 255.

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4
Q

What is IPv4?

A

Addresses that are numbers assigned to individual devices connected to a network. They are logical in nature in that they provide information about the location of the device.

(it is in dotted decimal notation represented with four decimal numbers between 0 and 255)

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5
Q

What is a subnet mask?

A

it is a special type of IPv4 address that together with the IP address determines which particular subnet of a larger network the device is a member.

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6
Q

What type of address is also necessary with an IP address?

A

A subnet mask.

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7
Q

Where can an IP address be assigned?

A

It can be assigned to both physical ports and virtual interfaces on devices.

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8
Q

What is a virtual interface?

A

A virtual interface means that there is no physical hardware on the device associated with it.

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9
Q

What do network communications depend on?

2.3.1.2

A

They depend on end user device interfaces, network device interfaces, and the cables that connect them

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10
Q

What does each physical interface have that enable it to work?

A

It has specifications or standards that define it.
EX
A cable connecting to the interface must be designed to match the physical standards of the interface.

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11
Q

What are four types of network media?

A

Twisted pair copper cables
fiber-optic cables
coaxial cables
wireless

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12
Q

Are media types interchangeable?

A

Each has media may not have the same characteristics and therefore may not be appropriate for the same purpose. Different types of network media have different features and benefits. (no)

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13
Q

What are some of the major differences between various types of media

A

-Distance the media can successfully carry a signal
environment in which the media is to be installed
-The amount of data and the speed at which it must be transmitted
-The cost of the media and installation

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14
Q

What are two things each link on the Internet require from media?

A

It requires a specific network media type and a particular network technology.

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15
Q

What is the most common local area network technology used today

A

Ethernet.

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16
Q

Where are ethernet ports usually found

A

They are found on end user devices, switch devices, and other networking devices that can physically connect to the network using a cable.

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17
Q

What type of connector does a cable need to connect to an Ethernet port?

A

It must have an RJ-45

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18
Q

What types of ports do Cisco IOS switches have(general)?

A

They have physical ports and Switch Virtual Interfaces (SVIs)

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19
Q

What are SVIs?

A

They are Switch Virtual Interfaces. No physical hardware is needed on the device to be associated with it.

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20
Q

Where is SVI created?

A

It is created within the software.

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21
Q

What does the virtual interface provide?

A

It provides a means to remotely manage a switch over a network using IPv4.

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22
Q

What is the default for SVI “out-of-the-box”?

A

there is one SVI appearing in the default configuration “out-of-the_-box. The default SVI it is VLAN1

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23
Q

How do you access a switch remotely?

2.3.2.1

A

An IP address and a subnet mask must be configured on the SVI along with at least one physical port and the VTY lines.

24
Q

What does a subnet mask do?

A

It determines which part of a larger network is used by an IP address.

25
Q

What does an IP address do?

A

Together with a subnet mask, uniquely identifies end device on the internetwork.

26
Q

What commands enables IP connectivity to S1 using IP address 192.168.10.2 and subnet mask 255.255.255.0?

A

interface vlan 1
ip address 192.168.10.2 255.255.255.0
no shutdown
(1.3.2.1 practice)

27
Q

In the global configuration mode, what does “interface vlan 1 do?

A

It is used to navigate to the interface configuration mode from the global configuration mode.

28
Q

In the special configuration interface mode, what does the command “ip address 192.168.19.2 255.255.255.0” do?

A

It configures the IP address and subnet mask for the switch.

29
Q

In the special configuration interface mode, what does the command “no shutdown” do?

A

It administratively enables the interface to an active state.

30
Q

What happens after the following commands are configured?
interface vlan 1
ip address 192.168.10.2 255.255.255.0
no shutdown

A

The switch has all the IP elements ready for communication over the network.

31
Q

Where are end devices configured for IP address and subnet mask?
2.3.2.2

A

In the PC settings where it can be entered manually or using DHCP

32
Q

What is the default gateway?

A

It is the IP address of the router interfaces used for network traffic to exit the local network usually assigned by the network administrator and is used when traffic must be routed to another network.

33
Q

What is the DNS server?

A

It is the IP address of the Domain Name System (DNS).

34
Q

For what purpose is the DNS server used?

A

It is used to translate IP addresses to web addresses.

35
Q

Explain why DNS server exist.

A

All devices on the internet are assigned and reached via an IP address. However, it is easier for people to remember names over numbers. Websites are therefore given names for simplicity. A DNS server is used to maintain the mapping between the IP addresses and names of various devices.

36
Q

What does DHCP stand for?

2.3.2.3

A

Dynamic Host Configuration Protocol (DHCP)

37
Q

What does DHCP do (the short version)?

A

It allows end devices in a network that have DHCP enabled to have IP information automatically configured.

38
Q

Why is DHCP convenient for businesses?

A

It allows their computers to automatically receive the necessary IPv4 information required to fully communicate over the network instead of having to manually configure all of them.

39
Q

From a Windows PC how do you configure DHCP

A

select “Obtain IP address automatically” and “Obtain DNS server address automatically.”

40
Q

What happens when you “Obtain an IP address automatically” and “Obtain DNS server address automatically”?

A

Your pc will be assigned information from an IP address pool and associated IP information set up on the DHCP server.

41
Q

How can you display DHCP IP configuration settings on windows PC?

A

You can use the command ipconfig at the command prompt. (practice 2.3.2.3)

42
Q

When do duplicate IP address conflicts occur between network device and a pc obtaining automatic IP addressing information from the DHCP server
2.3.1.4

A
  1. When a static (manual) IP address is defined for a network device and a DHCP server is installed.
  2. if you manually define a static IP address to a network device during a network failure involving the DHCP server. After the DHCP server becomes accessible over the network, the conflict arises.
  3. In
43
Q

How do you resolve an IP addressing conflict between a static IP address and DHCP?

A

Convert the network device with the static IP address to a DHCP client
or
exclude the static IP address of the end device from the DHCP scope

44
Q

If a static IP address is defined for a network device and then a DHCP server is installed, what may happen?

A

duplicate IP address conflicts may occur between the network device and a PC obtaining automatic IP addressing information from the DHCP server.

45
Q

What do you do when an IP conflict occurs when there are only static IP addresses.

A

Determine which IP addresses are available on the particular IP subnet and configure accordingly. Detailed documentation can aid in this endeavor.

46
Q

When are static IP addresses mostly used?

A

They are mostly used with servers and printers in a small to medium sized business network. However, employee devices use DHCP-allocated IP address information.

47
Q

What command is used to verify the internal IP configuration on a local host?
2.3.3.1

A

ping 127.0.0.1
on a reserved addressed (127.0.0.1)
(practice 2.3.3.1)

48
Q

What is the loopback address?

A

127.0.0.1

49
Q

What does the loopback address do?

A

The loop back address, 127.0.0.1, is a reserved address as defined by the TCP/IP protocol that routes packets back to the host.

50
Q

What does “ping 127.0.0.1” do?

A

it verifies that the network interface card, drivers, and the TCP/IP implementation are all functioning correctly.

51
Q

How do you verify switch interfaces?

2.3.3.2

A

in privileged EXEC mode
show ip interface brief
(practice 2.3.3.2)

52
Q

what information will the command “show ip interface brief” in privileged EXEC mode show?

A

it will show you the condition of the switch interfaces.

The name of the interface
The IP-Address if assigned,
That the interface is operation (OK?)
The method of set up (method)(manual or DHCP(I think))
Status (if it is up or down (I think))
Protocol
53
Q

How do you test PC-to-Switch Connectivity?

2.3.3.3

A

from the pc command line, ping the IP address for the S1 vlan1 interface

ex
C:>
C:>ping 192.168.10.2

54
Q

How do you test end to end connectivity from PC1 to PC2 with the same subnet mask and default gateway?

A

From the pc command line of PC1, ping the IP address of PC2.

C:>
C:>ping 192.168.10.11

A successful ping verifies end-to-end connectivity in the network.

55
Q

Practice
Labs
Packet Tracer activities

A

Practice: 2.3.2.1, 2.3.2.3 (2), 2.3.3.1 (2), 2.3.3.2, 2.3.3.3
Labs: 2.3.2.4
Packet Tracer Labs: 2.3.2.5

CISCO CCNA Semester 1: Introduction to Networks (51 decks)

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