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Network+ > Topic 1B Configure SOHO Networks > Flashcards

Topic 1B Configure SOHO Networks Flashcards

1
Q

Define a LAN.

A

Network scope restricted to a single geographic location and owned and managed by a single organization.

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2
Q

What does SOHO stand for?

A

Small office/home office

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3
Q

What does LAN stand for?

A

Local Area Network

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4
Q

What does WAN stand for?

A

Wide Area Network

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5
Q

Define a WAN.

A

Network scope that spans a large geographical area, incorporating more than one site and often a mix of different media types and protocols plus the use of public telecommunications networks.

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6
Q

What is one of the primary functions of the SOHO router?

A

To forward traffic between the LAN and the WAN.

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7
Q

Describe the LAN ports on the SOHO router.

A

A number of RJ-45 ports (typically four) usually labeled as the LAN ports.

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8
Q

What are the LAN ports on a SOHO router for?

A

To connect hosts on the LAN via cables.

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9
Q

What are the antennas on the SOHO router for?

A

To send and receive wireless signals.

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10
Q

What is the WAN port for on the SOHO router?

A

It is to connect to the ISP’s network.

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11
Q

At the the data link layer of the SOHO router, how are devices recognized?

A

The MAC address.

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12
Q

When servicing wireless and cabled hosts on a SOHO router, what layer, and what type of network are the devices on?

A

Data link, layer 2 LAN.

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13
Q

How does the wireless access point work on a SOHO router?

A

WAP is internally wired to the Ethernet switch.

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14
Q

How do the LAN ports work on a SOHO router?

A

The RJ-45 jacks are connected internally to an Ethernet switch.

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15
Q

How does a wireless network and an Ethernet network work together on the same SOHO router?

A

The WAP and Ethernet are wired to the same switch internally, forming a bridge between the cabled and wireless segments, creating a single logical local network.

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16
Q

At the the network layer of the SOHO router, how are devices recognized?

A

IP addresses.

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17
Q

The SOHO router runs a DHCP server, what is this for?

A

It allocates unique addresses to each host that connects to it over either an Ethernet port or via the wireless access point.

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18
Q

How does the SOHO router’s DHCP server name the hosts on the layer 3 network?

A

The addresses assigned to clients use the same first three octets as the router’s address: 192.168.1. The last octet can be any value from 1 to 254, excluding whichever value is used by the SOHO router.

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19
Q

What kind of IP address does the LAN side of the SOHO router have?

A

Private.

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20
Q

What kind of IP address does the WAN side of the SOHO router have?

A

Public.

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21
Q

What happens when a host on the SOHO routers’ LAN tries to access any valid IP address outside the LAN’s IP range?

A

The SOHO router forwards that packet over its WAN interface and directs any replies back to the host on the LAN.

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22
Q

Network security is essentially what?

A

It is essentially matter of allowing or preventing devices, users, and services (applications) from using the network.

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23
Q

What is the perimeter of the SOHO network?

A

The WAN interface is the network perimeter.

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24
Q

What can the SOHO router do to increase network security?

A

The SOHO router can apply filtering rules to traffic sent between the public and private zones, by using its firewall.

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25
Q

The firewall can be configured to block traffic based on what?

A

Source or destination IP addresses and also on the type of application.

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26
Q

At the the transport layer of the SOHO router, how are applications recognized?

A

Port numbers.

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27
Q

What can the SOHO router do to increase network security with its ports.

A

It can specify rules for each port.

28
Q

Any host can connect to the RJ-45 ports on the SOHO router and join the network, true or false?

A

True.

29
Q

What connects the SOHO router to the internet?

A

The WAN interface of the SOHO router connects it to the Internet.

30
Q

What does PSTN stand for?

A

Public Switched Telephone Network.

31
Q

What is the PSTN?

A

A Global network connecting national telecommunications systems.

32
Q

What does CPE stand for?

A

Customer Premises Equipment.

33
Q

What is CPE?

A

Any termination and routing equipment placed at the customer site.

34
Q

What is the demarcation point, or demarc?

A

The point at which the telco’s cabling enters the customer premises.

35
Q

What does the major infrastructure of the internet consist of?

A

High bandwidth trunks connecting Internet eXchange Points. Within an IXP datacenter.

36
Q

What does IXP stand for?

A

Internet eXchange Point.

37
Q

How do ISPs carry traffic around the internet.

A

ISPs establish links between their networks, using transit and peering arrangements to carry traffic to and from parts of the internet they do not physically own.

38
Q

How are ISPs arranged as far as transit?

A

There is a tiered hierarchy of ISPs that reflects to what extent they depend on transit arrangements with other ISPs.

39
Q

What does IANA stand for?

A

Internet Assigned Numbers Authority.

40
Q

What is IANA’s website address?

A

iana.org

41
Q

What does IANA do?

A

It manages allocation of IP addresses and maintenance of the top-level domain space. IANA allocates addresses to regional registries who then allocate them to local registries or ISPs.

42
Q

What does ICANN stand for?

A

Internet Corporation for Assigned Names and Numbers.

43
Q

Who runs IANA?

A

IANA is currently run by ICANN.

44
Q

What does IETF stand for?

A

Internet Engineering Task Force.

45
Q

What is IETF’s website address?

A

ietf.org

46
Q

What does IETF do?

A

focuses on solutions to Internet problems and the adoption of new standards, published as Requests for Comments (RFCs).

47
Q

Where is the official repository for RFCs located at .

A

rfc-editor.org

48
Q

What do RFCs describe?

A

Some RFCs describe network services or protocols and their implementation, while others summarize policies. Not all RFCs describe standards. Some are designated informational, while others are experimental.

49
Q

Are older RFCs updated?

A

No, if changes are required, a new RFC is published with a new number.

50
Q

What does hexadecimal mean?

A

Relating to or using a system of numerical notation that has 16 rather than 10 as its base.

51
Q

What does decimal mean?

A

Relating to or denoting a system of numbers and arithmetic based on the number ten.

52
Q

What does Base 10 mean?

A

Base 10 means that each digit can have one of ten possible values (0 through 9).

53
Q

In Base 10, A digit positioned to the left of another has how much more value times the value of the digit to the right.

A

A digit positioned to the left of another has 10 times the value of the digit to the right.

54
Q

What does Base 2 mean?

A

In Base 2, a digit in any given position can only have one of two values (0 or 1).

55
Q

In Base 2, A digit positioned to the left of another has how much more value times the value of the digit to the right.

A

A digit positioned to the left of another has 2 times the value of the digit to the right.

56
Q

How many binary digits does it take to represent a decimal value up to 255.

A

It takes 8 binary digits to represent a decimal value up to 255.

57
Q

8 binary digits would be called what?

A

An octet.

58
Q

How many bits in an octet?

A

8 bits.

59
Q

How many bytes are in an octet?

A

1 byte.

60
Q

How many bits are in an IP address?

A

32 bits.

61
Q

How many bytes are in an IP address?

A

4 bytes.

62
Q

How many octets are in an IP address?

A

4 octets.

63
Q

How many nibbles in an octet?

A

2 nibbles.

64
Q

How many nibbles are in an byte?

A

2 nibbles.

65
Q

How many nibbles are in an IP address?

A

8 nibbles

66
Q

Why is hexadecimal notation (or hex) used?

A

It is a convenient way of referring to the long sequences of bytes used in some other types of network addresses.

67
Q

What is Base 16?

A

Hex is base 16 with the possible values of each digit represented by the numerals 0 through 9 and the characters A, B, C, D, E, and F.

Network+ (21 decks)

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