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Networking > Ch 3: Addressing on Networks > Flashcards

Ch 3: Addressing on Networks Flashcards

1
Q

At the Transport layer of the OSI, what is used to find and communicate with a particular application running on a host?

A

port numbers

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2
Q

With a FQDN of ftp1.dallas.mycompany.com, what part is the domain name?

A

mycompany.com

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3
Q

How can you determine the manufacturer of a NIC card based on the MAC address?

A

The first 24 bits, known as the Organizationally Unique Identifier, identify the manufacturer.

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4
Q

What command can you utilize to display TCP/IP configuration information for each network adapter installed?

A

ipconfig /all

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5
Q

Which of the following IP addresses would be a loopback IP address?

A

127.0.0.1

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6
Q

What text editor can be used on Linux to view and edit the contents of a configuration file?

A

vim

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7
Q

On a Linux-based system, what command can be used to display TCP/IP information associated with every interface on the system?

A

ifconfig -a

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8
Q

Which of the following IPv6 addresses represents a global unicast address?

A

2000::/3

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9
Q

Which of the following protocols is used as a signaling protocol for the initial connection between hosts, but does not participate in data transfer during the session?

A

SIP

“The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications.”

Source: https://en.wikipedia.org/wiki/Session_Initiation_Protocol#:~:text=SIP%20clients%20typically%20use%20TCP,Transport%20Layer%20Security%20(TLS).

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10
Q

What is by far the most popular DNS server software available?

A

BIND

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11
Q

Your supervisor has asked you to configure a new prototype network with a dual stack configuration. What does this mean?

A

Both IPv4 and IPv6 protocols will be used on the network.

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12
Q

What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and communicating with the network?

A

ping

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13
Q

You are troubleshooting a network issue on a client computer and discover that the network card has an IP address of 169.254.196.200. What does this mean?

A

The computer is configured to use DHCP, but was unable to lease an address.

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14
Q

What part of a MAC address serves as the extension identifier, or device ID?

A

The last 24 bits of the MAC address.

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15
Q

In the classful addressing scheme, what range of network addresses is considered a Class B?

A

128.0.x.y to 191.255.x.y

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16
Q

How do routers create a broadcast domain boundary?

A

They do not forward broadcast traffic.

17
Q

Which of the following is NOT a range of IP addresses recommended for use in private networks?

  1. 0.0.0 through 10.255.255.255
  2. 16.0.0 through 172.31.255.255
  3. 168.0.0 through 192.168.255.255
  4. 0.0.0 through 127.255.255.255
A

127.0.0.0 through 127.255.255.255

18
Q

When using DHCP for IPv6 (i.e. DHCPv6), what port do clients receive responses on?

A

port 547

19
Q

What type of IPv6 address is fe80::8cf1:2c42:ffde:da1c?

A

link local address

20
Q

If a host’s IPv6 address contains the network adapter’s MAC address within the last 64 bits of the IPv6 address, what standard is being used?

A

EUI-64

21
Q

Encrypted control of remote computers using the RDP protocol is accomplished using what port number?

A

TCP 3389

22
Q

What statement regarding the Server Message Block protocol is accurate?

A

It is used by Windows and UNIX-based operating systems to share files.

23
Q

What is the ARPA domain suffix utilized for?

A

It is used for reverse DNS queries, and holds PTR records.

“A Pointer record (PTR) resolves an IP address to a fully-qualified domain name (FQDN) as an opposite to what A record does. PTR records are also called Reverse DNS records.”
Source: https://kb.intermedia.net/article/1317#:~:text=A%20Pointer%20record%20(PTR)%20resolves,also%20called%20Reverse%20DNS%20records.

24
Q

In a DNS zone, what type of record holds the name-to-address mapping for IPv6 addresses?

A

AAAA record

25
Q

You are setting up a DNS zone and have been asked to create SPF and DKIM records. What type of DNS record will hold this information?

A

TXT record

“A DNS zone is a distinct part of the domain namespace which is delegated to a legal entity—a person, organization or company, who are responsible for maintaining the DNS zone. A DNS zone is also an administrative function, allowing for granular control of DNS components, such as authoritative name servers.”
Source; https://ns1.com/resources/dns-zones-explained

“Sender Policy Framework (SPF) is an email authentication method designed to detect forging sender addresses during the delivery of the email.”
Source: https://en.wikipedia.org/wiki/Sender_Policy_Framework

“DKIM (Domain Keys Identified Mail) is an email authentication technique that allows the receiver to check that an email was indeed sent and authorized by the owner of that domain. This is done by giving the email a digital signature. “
Source: https://www.dmarcanalyzer.com/dkim/#:~:text=DKIM%20(Domain%20Keys%20Identified%20Mail,the%20email%20a%20digital%20signature.

26
Q

What does the MX record do in a forward DNS zone?

A

It identifies the e-mail server to be used for e-mail traffic for the domain.

“A mail exchanger record (MX record) specifies the mail server responsible for accepting email messages on behalf of a domain name. It is a resource record in the Domain Name System (DNS).”
Source: https://en.wikipedia.org/wiki/MX_record

“Forward DNS is a type of DNS request in which a domain name is used to obtain its corresponding IP address.”
Source: https://www.techopedia.com/definition/15671/forward-dns

27
Q

You are troubleshooting a DNS issue on a Linux system, and need to test the resolution of your domain mycompany.com MX record using Google’s DNS server with the IP address of 8.8.8.8. What dig command will accomplish this?

A

dig @8.8.8.8 mycompany.com MX

28
Q

What command can be used to check a domain computer’s time source from a Command Prompt window?

A

w32tm /query /source

29
Q

A Windows computer on your network is having issues resolving queries for a specific domain, but not other domains. Other computers on the same network resolve the name just fine. What command can you issue that might fix the problem?

A

ipconfig /flushdns

30
Q

In the DNS hierarchy, where is information about how to find the top-level domain servers held?

A

On the DNS root servers.

Networking (13 decks)

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