Resource Layer

There are information protocols that tells us about the state of the resource and management protocols that negotiate access to a resource.
Globus provides:

The Grid Resource Information Protocol (GRIP), based on LDAP, provides information about resources. GRRP is for resource registration.
The Grid Resource Access and Management (GRAM) protocol is HTTP-based and used for allocation of computational resource and monitoring and controlling them.
The GridFTP is an extension of FTP allows partial file access and management of parallelism for high-speed transfers.
LDAP.