Week 4 - Networking Services Flashcards by Deleted Deleted

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

PTR (Pointer)

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

255

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

Round Robin

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

CNAME

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

Start of Authority (SoA)

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A proxy is something that ______.

Communicates on behalf of something else.

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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 _______.

Reverse proxy

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

Anycast

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

Service Record (SRV)

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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?

Transport

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

ICANN

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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 _______.

Gateway

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

Port forwarding

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

Reverse lookup

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

Binary numbers

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

Root name server

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

Anycast

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

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

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

Address exhaustion

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

FQD
TLD
Subdomain
Host name

Subdomain
Host name

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

User datagram protocol (UDP)

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

Application

The total number of IPv4 addresses is approximately

4.2 billion

There are 13 _____ name servers.

Root name servers

Two-factor authentication is _____.

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

VPNs are known as a _______ protocol.

tunneling

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

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

What is the importance of using DNS?

Name Resolution

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

A proxy service

What technique allows for inbound traffic through a NAT?

Port forwarding

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

Masquerading

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.

Dynamic Allocation

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

IP Masquerading

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

Automatic allocation

Which technology uses a tunneling protocol?

Virtual Private Network (VPN)

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

Recursive name server

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

Port 53

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?

Four Four zones would include the parent and the three subdomains.

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

Media Access Control (MAC) address

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?

ARIN ARIN primarily serves the United States and Canada.

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

Proxy Server

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

SYN