What is L2 & L3 support in mainframe operations and maintenance?

In mainframe support area..what is the meaning of L2 & L3 support?

2 Comments

  1. Tommy says:

    router and switch function

  2. sirdice says:

    Level 1; helpdesk
    Level 2; fixes things L1 can’t
    Level 3; fixes things L2 can’t

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