Which statement about IP addresses is true?

Which statement about IP addresses is true?

• A. Static addresses are always dynamic.
• B. Dynamic addresses never change.
• C. Static: assigned by DHCP.
• D. Static: fixed address; dynamic: assigned temporarily by DHCP.

Answer: (D)

IP addresses come in two common modes: static and dynamic. A static address is a fixed address assigned to a device and remains the same unless you change it. A dynamic address is obtained from a DHCP server and is issued for a temporary lease; it can change when the lease expires, the device reconnects, or the server reuses addresses. This statement is correct because it succinctly expresses that static addresses are fixed, while dynamic addresses are granted temporarily by DHCP. Static addressing is useful for devices you need to reach at a consistent address, like servers or printers. Dynamic addressing is convenient for clients that don’t require a fixed address, as DHCP automatically assigns and can reassign IPs as leases cycle. The other ideas don’t fit: static addresses are not dynamic, so they don’t stay fixed; dynamic addresses can and often do change when leases end or devices reconnect; and static addresses are not typically assigned by DHCP—they’re usually configured manually (though a DHCP server can reserve an address for a device, the general notion of static is manual configuration).

IP addresses come in two common modes: static and dynamic. A static address is a fixed address assigned to a device and remains the same unless you change it. A dynamic address is obtained from a DHCP server and is issued for a temporary lease; it can change when the lease expires, the device reconnects, or the server reuses addresses.

This statement is correct because it succinctly expresses that static addresses are fixed, while dynamic addresses are granted temporarily by DHCP. Static addressing is useful for devices you need to reach at a consistent address, like servers or printers. Dynamic addressing is convenient for clients that don’t require a fixed address, as DHCP automatically assigns and can reassign IPs as leases cycle.

The other ideas don’t fit: static addresses are not dynamic, so they don’t stay fixed; dynamic addresses can and often do change when leases end or devices reconnect; and static addresses are not typically assigned by DHCP—they’re usually configured manually (though a DHCP server can reserve an address for a device, the general notion of static is manual configuration).