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The Bits and Bytes of Computer Networking > Week 4 - Networking Services > Flashcards

Week 4 - Networking Services Flashcards

1
Q

A _______ record is responsible for resolving an IP to a domain name.

A

PTR (Pointer)

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2
Q

A complete Fully Qualified Domain Name (FQDN) is limited to how many characters?

A

255

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3
Q

A concept that involves iterating over a list of items one by one in an orderly fashion is known as _______.

A

Round Robin

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4
Q

A DNS record that’s used to redirect traffic from one domain name to another is known as a _______ record.

A

CNAME

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5
Q

A new Domain Name System (DNS) server is being configured. Which record type is used to declare a new zone?

A

Start of Authority (SoA)

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6
Q

A proxy is something that ______.

A

Communicates on behalf of something else.

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7
Q

A service that might appear to be a single server to external clients, but actually represents many servers living behind it, is known as a _______.

A

Reverse proxy

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8
Q

A technique that’s used to route traffic to different destinations, depending on factors like location, congestion, or link health, is known as ______.

A

Anycast

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9
Q

A video conferencing application isn’t working due to a Domain Name System (DNS) port error. Which record requires modification to fix the issue?

A

Service Record (SRV)

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10
Q

A Virtual Private Network (VPN) uses a particular layer from the OSI reference model to carry an encrypted payload that actually contains an entire second set of packets. Which layer is used?

A

Transport

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11
Q

Administration and definition of TLDs are handled by a non-profit organization known as _______.

A

ICANN

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12
Q

Along with an IP address, a subnet mask, and a name server, the other thing required for a computer to operate on a network is a _______.

A

Gateway

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13
Q

An internal system behind a firewall needs to be configured for remote access. How should Network Address Translation be configured?

A

Port forwarding

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14
Q

An IT systems engineer creates a new Domain Name System (DNS) zone that contains pointer (PTR) resource records. Which zone type has been created?

A

Reverse lookup

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15
Q

At the very lowest level, what data does a computer understand?

A

Binary numbers

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16
Q

During the name resolution process, which server does a local recursive server contact first?

A

Root name server

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17
Q

During the name resolution process, which technique is used to avoid congestion when querying a server?

A

Anycast

18
Q

NAT addresses concerns over the dwindling IPv4 address space by _____.

A

Allowing computers using non-routable address space to communicate with the Internet.

19
Q

Network Address Translation (NAT) technology provides a major benefit for which of these network problems?

A

Address exhaustion

20
Q

The “www” portion of a domain is known by which of the given options? Select all that apply.

  • FQD
  • TLD
  • Subdomain
  • Host name
A

Subdomain
Host name

21
Q

The Domain Name System (DNS) network service uses which transport layer protocol?

A

User datagram protocol (UDP)

22
Q

The Dynamic Configuration Host Protocol (DHCP) operates at which Open Systems Interconnection (OSI) model layer?

A

Application

23
Q

The total number of IPv4 addresses is approximately

A

4.2 billion

24
Q

There are 13 _____ name servers.

A

Root name servers

25
Q

Two-factor authentication is _____.

A

a method where you need more than a username and a password.

26
Q

VPNs are known as a _______ protocol.

A

tunneling

27
Q

Name two benefits the Domain Name System (DNS) provides?

A
  1. Easy mapping to a new Internet Protocol (IP) address.
  2. Ease of address memorisation
28
Q

What is the importance of using DNS?

A

Name Resolution

29
Q

What service acts on behalf of a client in order to access another service?

A

A proxy service

30
Q

What technique allows for inbound traffic through a NAT?

A

Port forwarding

31
Q

What term defines keeping the address of one computer secret from another?

A

Masquerading

32
Q

When a range of IP addresses is set aside for client devices, and one of these IPs is issued to these devices when they request one, this is known as _______ allocation.

A

Dynamic Allocation

33
Q

When NAT hides the source IP of an originating device, this is known as ________.

A

IP Masquerading

34
Q

Which allocation method can be used with a Dynamic Host Configuration (DHCP) server to assign the same address to the same machine if possible?

A

Automatic allocation

35
Q

Which technology uses a tunneling protocol?

A

Virtual Private Network (VPN)

36
Q

Which type of Domain Name System (DNS) server performs a full name resolution request?

A

Recursive name server

37
Q

What port on a name server is used for User Datagram Protocol (UDP) name request packets?

A

Port 53

38
Q

A company with a large number of hosts creates three subdomains under a main domain. For easier management of the host records, how many zones should be used?

A

Four

Four zones would include the parent and the three subdomains.

39
Q

Which of the following is NOT configured by a Dynamic Host Protocol (DHCP) server?

A

Media Access Control (MAC) address

40
Q

IANA has primarily been responsible with assigning address blocks to five regional internet registries (RIR). A tech needs to research address blocks assigned in the United States. Which RIR should the tech contact?

A

ARIN

ARIN primarily serves the United States and Canada.

41
Q

What service acts on behalf of a client in order to access another service?

A

Proxy Server

42
Q

When a client computer sends a request to a Domain Name System (DNS) server, what type of packet is sent?

A

SYN

The Bits and Bytes of Computer Networking (5 decks)

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