1. Copyright ©Universalinet.Com, LLC 2009 Implementing Secure Converged Wide Area Networks (642-825 ISCW) Take-Aways Course 1: Cable (HFC) Technologies

2. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away Cable (HFC) Technologies Despite Cable Hybrid Fiber Coax (HFC) limitations associated with Data Over Cable Service Interface Specifications (DOCSIS) data transmission, HFC cabling and networking concepts are a viable data medium to data and voice distribution systems. DOCSIS The DOCSIS standard for data transport over Cable Television System (CATV) mandates that the DOCSIS system provide > 99% availability when forwarding 1500- byte packets at the rate of at least 100 packets per second. To do so, DOCSIS has set CATV upstream/downstream performance specifications.

3. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away Digital Subscriber Line (DSL) Technologies A modern technology, xDSL uses existing twisted pair, plain old telephone system (POTS) lines to transport high-bandwidth data, such as multimedia and video, to service subscribers. xDSL refers to the family of DSL types: ADSL, SDSL, HDSL, RADSL, and VDSL. The primary components of DSL are are a telecommunications office and customer premises equipment (CPE) devices. (continued)

4. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away Cable Modems Cable modems primarily deliver broadband Internet access in the form of cable Internet. Cable modems also utilize unused bandwidth on a cable television network. Cable modem services require access to two protocols: TFTP (Trivial File Transfer Protocol) and DHCP (Dynamic Host Configuration Protocol). (continued)

5. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away MPLS Cisco’s Multi-protocol Label-Switching (MPLS) enables organizations and Service Providers to build next-generation intelligent networks that deliver a wide variety of advanced, value-added services over a single infrastructure. MPLS can be integrated over existing infrastructures such as IP, Frame Relay, ATM, and Ethernet. As well, MPLS application components can be integrated with Layer 3 virtual private networks (VPNs), Layer 2 VPNs, Traffic Engineering, quality of service (QoS), and IPV6, for highly secure and scalable networks. (continued)

6. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away Frame-Mode MPLS Frame-Mode MPLS requires that the Cisco router have Cisco Express Forwarding (or, CEF) Switching enabled—whether globally, or for individual interfaces. To enable CEF switching globally is to enable CEF switching on all interfaces. (continued)

7. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away Basic Cisco Teleworker Services include: High-speed Internet connections to the home VPN-cable routers Terminal emulation Laptops as portable PCs GroupWare VoIP Teleworker Services substitute work-in-the-workplace for telecommuting or remote access networking. (continued)

8. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away IPsec (IP security) is a suite of protocols for securing Internet Protocol (IP) communications through the authentication/encryption of each IP packet in a data stream VPNs A virtual private network (VPN) is a communications network that is tunneled through another network, and dedicated for a specific network use. (continued)

9. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away SDM The Cisco Router and Security Device Manager (SDM) supports a wide range of Cisco IOS Software releases and is available free of charge on various Cisco router models. SDM offers smart wizards and advanced configuration support for LAN and WAN interfaces, Network Address Translation (NAT), stateful and application firewall policy, IPS, IPSec VPN, QoS, and NAC policy features. Its primary purpose to to deploy firewall security features. (continued)

10. Copyright ©Universalinet.Com, LLC 2009 Course 1 Take-Away AAA Authentication, Authorization, and Accounting (AAA) is a framework for controlling access to IT resources. AAA enforces policies, audits usage, and provides information that is necessary to bill for services. AAA results in effective network management and security (continued)