/// @brief Maximum size of a client ID
///
/// This is the same as the maximum size of the underlying DUID.
+ ///
+ /// @note RFC 2131 does not specify an upper length of a client ID, the
+ /// value chosen here just being that of the underlying DUID. For
+ /// some backend database, there may be a possible (minor)
+ /// performance enhancement if this were smaller.
static const size_t MAX_CLIENT_ID_LEN = DUID::MAX_DUID_LEN;
/// @brief Constructor based on vector<uint8_t>
/// @brief Returns an IPv4 lease for specified IPv4 address
///
/// This method return a lease that is associated with a given address.
- /// For other query types (by hardware addr, by DUID) there can be
+ /// For other query types (by hardware addr, by Client ID) there can be
/// several leases in different subnets (e.g. for mobile clients that
/// got address in different subnets). However, for a single address
/// there can be only one lease, so this method returns a pointer to