Some Comments on Q-Irresolute and Quasi-Irresolute Functions

The aim of this paper is to continue the study of θ-irresolute and quasi-irresolute functions as well as to give an example of a function which is θ-irresolute but neither quasi-irresolute nor an R-map and thus give an answer to a question posed by Ganster, Noiri and Reilly. We prove that RS-compactness is preserved under open, quasi-irresolute surjections.

Types of Addresses and Levels of use in the TCP/IP Protocol Stack

The publication comments on certain moments of the method of teaching the types of addresses and their use in the TCP/IP protocol stack.