Which ESA function maintains a set of rules that control incoming connections from remote hosts for a listener?

Question

Options

• ALDAP
• BHAT
• CVEST
• DSender group
• ERAT

• A
  6% (1)
• B
  94% (15)

Explanation

HAT (Host Access Table) is the ESA function that maintains rules governing incoming SMTP connections from remote hosts for a listener - it determines whether to accept, reject, throttle, or relay connections based on sender reputation and policies.

Why the distractors are wrong:

• A. LDAP - a directory protocol used for recipient validation and authentication lookups, not connection control
• C. VEST - not a real ESA feature; this is a fabricated distractor
• D. Sender Group - a component within the HAT that categorizes senders (e.g., WHITELIST, BLACKLIST), but the HAT itself is the overarching table that holds and enforces the rules
• E. RAT (Recipient Access Table) - controls which recipient addresses are accepted after a connection is established, not the connection itself

Memory tip: Think HAT = "Who gets in the door." The HAT acts like a bouncer - before any email is even accepted, it checks the incoming host against its rule set. The RAT handles who the mail is addressed to once inside, so: HAT = Host access (connection layer), RAT = Recipient access (envelope layer).

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