ccna 9th chapter answers

ccna 9th chapter answers.Another concern about SPIT is that using an anti-spam approach to SPIT will not work. The real-time nature of voice calls makes dealing with SPIT more challenging than spam, and new methods must be invented to address SPIT. Authenticated Transport Layer Security (TLS) stops most SPIT attacks because endpoints only receive packets from trusted devices.6.4.4.5 Voice Phishing, Tariff Fraud, and SIP VulnerabilitiesTwo common types of fraud on VoIP networks are voice network phishing (vishing) and tariff (toll) fraud. Voice phishingVishing (voice phishing) uses telephone communication techniques to collect information such as hundred. Receiving account details from users. The first reported case of voice phishing affected PayPalo the victim of the scam mud first receives an email claiming to be from PayPal requesting him to verify his credit card information over the phone. The victim calls the phone number and is then asked to enter his credit card number using the keypad. After the credit R number is entered, the perpetrators of this fraud are able to steal money from these victims' accounts.Because the cost of calling using VoIP is cheaper than using a standard traditional phone system, attackers can call thousands of users for very little cost. Users trust phones more than websites, but these spam techniques can undermine trust in VoIP.6.4 Wireless, VoIP, and SAN Security 177Tariff FraudToll fraud is the unauthorized access to a PSTN trunk on a PBX or voicemail system (. . external lines) to steal long distance service. Toll fraud is a multi-billion dollar IE law industry and H all organizations are vulnerable. Theft can also be defined as the use of telephone communication systems by authorized and unauthorized users to access unauthorized numbers, such as toll telephone numbers.This type of fraud is not new, and a PBX is quite vulnerable. The difference in this approach, as opposed to large crowds actively hacking IP systems, is that few people can break into a PBX o To protect against such fraud, network administrators use features in the Cisco Unified Communications Manager to control phone calls, such as dial plan filtering, quarantine, or forced authorization codes (FACs).SIP vulnerabilities