This week, 3 Communications Equipment stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This is a strong week for Palo Alto Networks, Inc. (PANW). The company’s rating climbs to A from the previous week’s B. Palo Alto Networks, Inc. offers a next-generation network security platform that allows enterprises, service providers, and government entities to secure their networks. The company also gets A’s in sales growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PANW stock.

This week, Silicom Ltd. (SILC) pushes up from a C to a B rating. Silicom Ltd. designs, manufactures, markets, and supports Multi-Port Gigabit-Ethernet Server Adapters. The company also gets A’s in earnings growth, earnings revisions, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of SILC stock.

Ceragon Networks Ltd (CRNT) improves from a C to a B rating this week. Ceragon Networks Ltd provides wireless backhaul solutions that enable cellular operators and other wireless service providers to deliver voice and data services worldwide. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of CRNT stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.