Harry Reynolds is a senior test engineer in the JUNOS software Core protocols group at Juniper, where he also has worked on courseware and certification offerings. He is CCIE # 4977, and JNCIE # 3, and holds various other industry and teaching certifications. Harry was a contributing author on the Juniper Network Complete Reference (McGraw- Hill, 2002), and wrote the JNCIE and JNCIP Study Guides (Sybex Books 2003).