HomeSmall to medium business security/ResourcesCustomers Global Giants Join Forces in Cybersecurity Telefonica is one of the largest broadband and telecommunications providers in the world. Telefonica is constantly looking for partners with complementary skills and expertise, to inform and enhance its solutions. Read now Latest Articles What is DNS Cache Poisoning or Spoofing? Social Engineering - Definition What is Metamorphic Virus? What is a Tunneling Protocol? Hvad er ransomware?