The Bits and Bytes of Computer Networking. Week 4
Network Services Questions and Answers (2022/2023)
(Verified Answers)
What transport layer protocol does DNS normally use?
UDP; While DNS over TCP does exist, UDP is the most common protocol.
A DNS TTL determines what?
How long a DNS entry is allowed to be cached; TTL stands for Time to Live and
determines how long a DNS entry can be cached
How many root servers are there?
13; There are 13 root servers.
An A Record contains what?
IPv4 address; An A record contains an IPv4 address
Select all that are true.
One domain name can point to one IP; This is a valid DNS setup
One domain name can point to many IPs; this is a valid DNS setup.
Many domain names can point to the same IP; This is a valid DNS setup.
MX stands for ________.
Mail exchange; An MX record stores a mail server's IP.
A fully qualified domain name can contain how many characters?
255; An FQDN is limited to a total length of 255 characters.
What are the four things that all computers need configured in order to operate on a
modern network? Check all that apply.
An IP address; All computers need these four things configured in order to operate on a
modern computer network.
a name server; Computers need a name server in order to operate on a network.
a subnet mask; All computers need these four things configured in order to operate on a
modern computer network.
a default gateway; All computers need these four things configured in order to operate
on a modern computer network.
When using Fixed Allocation DHCP, what's used to determine a computer's IP?
a MAC address; Fixed Allocation DHCP ensures that computers receive an IP address
reserved for it via its MAC address.
The process by which a client configured to use DHCP attempts to get network
configuration information is known as _________________.
DHCP Discovery; DHCP Discovery is how a client determines configuration information.
NAT addresses concerns over the dwindling IPv4 address space by
___________________.
allowing computers using non-routable address space to communicate with the Internet;
NAT allows networks to use non-routable address space for their internal devices.
Network Services Questions and Answers (2022/2023)
(Verified Answers)
What transport layer protocol does DNS normally use?
UDP; While DNS over TCP does exist, UDP is the most common protocol.
A DNS TTL determines what?
How long a DNS entry is allowed to be cached; TTL stands for Time to Live and
determines how long a DNS entry can be cached
How many root servers are there?
13; There are 13 root servers.
An A Record contains what?
IPv4 address; An A record contains an IPv4 address
Select all that are true.
One domain name can point to one IP; This is a valid DNS setup
One domain name can point to many IPs; this is a valid DNS setup.
Many domain names can point to the same IP; This is a valid DNS setup.
MX stands for ________.
Mail exchange; An MX record stores a mail server's IP.
A fully qualified domain name can contain how many characters?
255; An FQDN is limited to a total length of 255 characters.
What are the four things that all computers need configured in order to operate on a
modern network? Check all that apply.
An IP address; All computers need these four things configured in order to operate on a
modern computer network.
a name server; Computers need a name server in order to operate on a network.
a subnet mask; All computers need these four things configured in order to operate on a
modern computer network.
a default gateway; All computers need these four things configured in order to operate
on a modern computer network.
When using Fixed Allocation DHCP, what's used to determine a computer's IP?
a MAC address; Fixed Allocation DHCP ensures that computers receive an IP address
reserved for it via its MAC address.
The process by which a client configured to use DHCP attempts to get network
configuration information is known as _________________.
DHCP Discovery; DHCP Discovery is how a client determines configuration information.
NAT addresses concerns over the dwindling IPv4 address space by
___________________.
allowing computers using non-routable address space to communicate with the Internet;
NAT allows networks to use non-routable address space for their internal devices.
