Bethany Mayer resigned as president of the Ixia Solutions Group of Keysight Technologies Inc. effective Friday. Mark Pierpoint has been named as acting president of Ixia Solutions, in Calabasas, while the company looks for a permanent successor. Ixia, a developer of software and hardware that tests telecommunications equipment and networks, was acquired in April by Keysight, in Santa Rosa, in a deal valued at $1.6 billion. Mayer joined Ixia in August 2014 from Hewlett-Packard Co. where she had executive positions in the Network Functions Virtualization business, Networking Business unit and Enterprise Servers Storage and Networking Group for the Palo Alto computer company. Pierpoint has served as general manager of Keysight’s Internet Infrastructure Solutions since 2015. Prior to that he led the company’s modular software and instrument initiatives. “Mark has worked closely with the Ixia business since the acquisition earlier this year and is well positioned to lead the completion of our integration activities and maximize the potential of our expanded company,” Keysight Chief Executive Ron Nersesian said in a prepared statement.