Networking Concepts Flashcards

1
Q

Which protocol is HTTP directly encapsulated in?

TCP

UDP

ICMP

A

TCP

TCP is used for connection-oriented, guaranteed, acknowledged communication

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2
Q

hich protocol is DHCP directly encapsulated in?

TCP

UDP

ICMP

A

UDP

UDP is used for connectionless, unguaranteed, and unacknowledged communication

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3
Q

Which protocol is used for information and error reporting?

TCP

UDP

ICMP

A

ICMP

ICMP provides knowledge to IP with both informational and error messages

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4
Q

Which layer of OSI are routers found at?

1

2

3

A

3

Routers are found at Layer 3 of OSI

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5
Q

Which layer of OSI do MAC addresses belong to?

1

2

3

A

2

Frames at Layer 2 contain MAC addresses

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6
Q

TCP and UDP exist at which layer of OSI?

6

5

4

A

4

Layer 4 is where the sending application chooses between connection-oriented TCP and connectionless UDP

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7
Q

What type of routing protocol is OSPF?

Static

EGP

Link state

A

Link state

Open Shortest Path First is the most common IGP today. It’s a link state routing protocol, as the state of the link is constantly being monitored

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8
Q

What field in the Ethernet frame do switches use to learn where hosts are?

Source MAC address

Destination IP address

Destination MAC address

A

Source MAC address

When frames enter an interface, the switch logs the source MAC address and the interface on which it was heard

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9
Q

Which of the following separates the control plane from the data plane in routers and switches?

PoE

IPv6

NAT

A

PoE

Software defined networking uses a controller to move traffic through an internetwork

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10
Q

Which of these is a valid host IP address on the 10.1.0.0/16 network?

  1. 1.0.1
  2. 2.0.1
  3. 1.255.255
A

10.1.0.1

The address must start with 10.1 and all host bits can’t be all zeros or all ones

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11
Q

Which one of these is not a DHCP message type?

Discover

Offer

Reply

A

Reply

The third step is Request, not Reply

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12
Q

Which of these IP addresses can’t be used on the Internet?

  1. 167.1.1
  2. 168.1.1
  3. 169.1.1
A

192.168.1.1

Addresses that begin with 192.168 are private, and can’t be used on the Internet

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13
Q

Which of the following wired topologies is used today to connect devices of the same network together?

Ring

Mesh

Star

A

Star

On networks today, the switch acts as the central device in a star topology

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14
Q

Which of the following topologies uses a WAP?

Infrastructure

Ad hoc

Bus

A

Infrastructure

The infrastructure topology uses a wireless access point

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15
Q

What standard defines wireless networks?

  1. 2
  2. 3
  3. 11
A

802.11

The 802.11 standards define every aspect of wireless networks

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16
Q

Which of the following is the latest 802.11 standard used to provide LAN access?

  1. 11a
  2. 11b
  3. 11ac
A
  1. 11ac

802. 11ac devices are on the shelves today

17
Q

SIM cards came from which technology?

GSM

TDMA

CDMA

A

GSM

GSM introduced the SIM card

18
Q

What’s the first step to installing a wireless network?

Configure the WAP.

Conduct a site survey.

Assign IP addresses to the hosts.

A

Conduct a site survey.

The site survey helps determine the best location for the WAPs

19
Q

Google Docs is an example of which of the following?

SaaS

PaaS

IaaS

A

SaaS

Software available over the Internet is Software as a Service

20
Q

Which one of these is not a cloud delivery model?

Public

Hybrid

Mesh

A

Mesh

There is no mesh cloud delivery model

21
Q

Which of the following is a use case for IaaS?

Running programs over the Internet

Web site development

A company that needs extra servers to handle a spike in traffic for holiday shopping

A

A company that needs extra servers to handle a spike in traffic for holiday shopping

Infrastructure as a Service provides a company an extension to their onsite data center

22
Q

Which DNS record can be used for security?

SOA

PTR

TXT

A

TXT

The Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) are implemented through the TXT record

23
Q

Which of these DNS records is found in a reverse lookup zone?

A

MX

PTR

A

PTR

Pointer records resolve an IP address to its corresponding hostname

24
Q

Which of the following is true regarding DHCP relay agents?

They forward broadcasts from clients.

They turn broadcasts from clients into unicasts.

They turn unicasts from clients into broadcasts.

A

They turn broadcasts from clients into unicasts.

DHCP relay agents take broadcasts from clients and unicast them to DHCP servers. Routers never forward broadcasts, nor do they turn unicasts into broadcasts