IT TECHNICAL EXAMINATION PREP SHEET
2026 FULLY SOLVED GRADED A+
◍ What is DHCP? Answer: Dynamic Host Configuration Protocol. It
is a network service that automatically assigns IP Addressing
information to devices on the network.
◍ What is the significance of the 169.254.X.X Address? Answer:
These are APIPA addresses. They are automatically assigned to a
device that is unable to obtain an IP Address from a DHCP Server.
◍ What is the significance of the 127.X.X.X Address? Answer: This
is the IPv4 address range that is reserved for loopback testing.
◍ What is a network and what do we use them. Answer: A network is
two or more connected devices that can communicate for the purpose
of sharing resources.
◍ What is the purpose of a Domain? Answer: A domain allows for
centralized administration and authentication of all of the devices and
users in your network.
◍ What is the difference between a hub, switch, and router? Answer:
A hub sends everything coming in, out to every other port so that all
segments of the LAN can see all packets. It is done with no
intelligence and it poses a security risk.
, A switch sends data directly to the receiving machine with
intelligence and isolates each machine into its own collision domain.
A router allows communication between network segments. It
forwards packets along networks. It is connected to at least two
networks, commonly two LANs or WANs or a LAN and its ISP's
network.
◍ What is the difference between TCP and UDP? Answer: TCP-
Transmission Control Protocol- Guarantees delivery with a three-way
handshake. Used in file downloads.
UDP- User Datagram Protocol- Best effort delivery with no
guarantee. Used in streaming media and VOIP.
◍ Tell me about RAID 0, RAID 1, and RAID 5. Answer: RAID 0-
Striping, setup for best performance, but it has no Fault Tolerance.
Could be used in an Auto CAD or Photoshop workstation.
RAID 1- Mirroring, set up for full fault tolerance, but has no
performance benefits. Used for vital data that cannot be lost.
Commonly used for a system's OS.
RAID 5- Stripe w/ Parity, setup for both performance and fault
tolerance. RAID 5 requires a minimum of 3 disks and you can only
ever lose 1 drive at a time without losing any data.
◍ What is an IP Address? Answer: An IP address is a logical address
given to devices within a network that allow them to communicate
with other devices on that network using TCP/IP.
2026 FULLY SOLVED GRADED A+
◍ What is DHCP? Answer: Dynamic Host Configuration Protocol. It
is a network service that automatically assigns IP Addressing
information to devices on the network.
◍ What is the significance of the 169.254.X.X Address? Answer:
These are APIPA addresses. They are automatically assigned to a
device that is unable to obtain an IP Address from a DHCP Server.
◍ What is the significance of the 127.X.X.X Address? Answer: This
is the IPv4 address range that is reserved for loopback testing.
◍ What is a network and what do we use them. Answer: A network is
two or more connected devices that can communicate for the purpose
of sharing resources.
◍ What is the purpose of a Domain? Answer: A domain allows for
centralized administration and authentication of all of the devices and
users in your network.
◍ What is the difference between a hub, switch, and router? Answer:
A hub sends everything coming in, out to every other port so that all
segments of the LAN can see all packets. It is done with no
intelligence and it poses a security risk.
, A switch sends data directly to the receiving machine with
intelligence and isolates each machine into its own collision domain.
A router allows communication between network segments. It
forwards packets along networks. It is connected to at least two
networks, commonly two LANs or WANs or a LAN and its ISP's
network.
◍ What is the difference between TCP and UDP? Answer: TCP-
Transmission Control Protocol- Guarantees delivery with a three-way
handshake. Used in file downloads.
UDP- User Datagram Protocol- Best effort delivery with no
guarantee. Used in streaming media and VOIP.
◍ Tell me about RAID 0, RAID 1, and RAID 5. Answer: RAID 0-
Striping, setup for best performance, but it has no Fault Tolerance.
Could be used in an Auto CAD or Photoshop workstation.
RAID 1- Mirroring, set up for full fault tolerance, but has no
performance benefits. Used for vital data that cannot be lost.
Commonly used for a system's OS.
RAID 5- Stripe w/ Parity, setup for both performance and fault
tolerance. RAID 5 requires a minimum of 3 disks and you can only
ever lose 1 drive at a time without losing any data.
◍ What is an IP Address? Answer: An IP address is a logical address
given to devices within a network that allow them to communicate
with other devices on that network using TCP/IP.
