TSB Relationship to topology(2/3) But analogies are imperfect Telephone numbers identify a circuit, a wire going somewhere, but are now portable IP addresses identify a terminal device, a computer. but can be dynamically assigned translated (NATing)8 TSB Relationship to topology (2/3) • But analogies are imperfect – Telephone numbers identify a circuit, a wire going somewhere, but are now portable – IP addresses identify a terminal device, a computer, but can be: • dynamically assigned • translated (NATing)