How many types of DHCP Lease Timers exist for IPv6?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (B)

DHCPv6 manages address leases with two timers: T1 and T2. T1 tells the client to start renewing the lease with the original DHCPv6 server that granted the address. If renewal succeeds, the lease continues as normal. If renewal isn’t possible, the client waits for T2 and then attempts to rebind with any available DHCPv6 server. This two-step process ensures the client can continue using the address even if the original server becomes unavailable.

It’s also helpful to distinguish these DHCP lease timers from IPv6 address lifetimes (preferred lifetime and valid lifetime), which govern how long an address remains usable, not how the DHCP lease is renewed.