CCNA 3 - Identify and correct common network problems at layers 1, 2, 3, and 7 using a layered model approach. Interpret network diagrams. Select the appropriate media, cables, ports, and connectors to connect switches to other network devices and hosts. Explain the technology and media access control method for Ethernet networks. Explain basic switching concepts and the operation of Cisco switches. Perform and verify initial switch configuration tasks including remote access management. Describe enhanced switching technologies such as VLANs, VLAN Trunking Protocol (VTP), Rapid Spanning Tree Protocol (RSTP), Per VLAN Spanning Tree Protocol (PVSTP), and 802.1q. Describe how VLANs create logically separate networks and how routing occurs between them. Configure, verify, and troubleshoot VLANs, trunking on Cisco switches, interVLAN routing, VTP, and RSTP. Interpret the output of various show and debug commands to verify the operational status of a Cisco switched network. Verify network status and switch operation using basic utilities such as ping, traceroute, Telnet, Secure Shell (SSH), Address Resolution Protocol (ARP), and ipconfig, as well as the show and debug commands. Identify, prescribe, and resolve common switched network media issues, configuration issues, autonegotiation, and switch hardware failures. Manage Cisco IOS Software. Manage Cisco IOS configuration files (save, edit, upgrade, and restore). Describe standards associated with wireless media, such as (IEEE WI-FI Alliance, ITU/FCC) standards. Identify and describe the purpose of the components in a small wireless network, such as Service Set Identification (SSID), Basic Service Set (BSS), and Extended Service Set (ESS). Identify basic configuration parameters on a wireless network to ensure that devices connect to the correct access points. Compare and contrast Wi-Fi Protected Access (WPA) security features and capabilities of open, Wired Equivalent Privacy (WEP), and WPA-1/2 networks. Describe common wireless-network implementation issues such as interference and  misconfiguration.

CCNA 4 - Describe the components required for network and Internet communications. Implement basic switch security measures such as port security, trunk access, and management VLANs. Explain the operation and benefits of using DHCP and DNS. Configure, verify, and troubleshoot DHCP and DNS operations on a router. Describe current network security threats and explain how to implement a comprehensive security policy to mitigate common threats to network devices, hosts, and applications. Describe the functions of common security appliances and applications. Describe recommended security practices to secure network devices. Describe the purpose and types of access control lists (ACLs). Configure and apply ACLs based on network filtering requirements. Configure and apply an ACLs to limit Telnet and SSH access to the router using the Security Device Manager command-line interface (SDM/CLI). Verify, monitor, and troubleshoot ACLs in a network environment. Explain the basic operation of Network Address Translation (NAT). Configure NAT for given network requirements using SDM/CLI. Troubleshoot NAT issues. Describe different methods for connecting to a WAN. Configure and verify a basic WAN serial connection. Configure and verify a Point-to-Point Protocol (PPP) connection between Cisco routers. Configure and verify Frame Relay on Cisco routers. Troubleshoot WAN implementation issues. Describe the importance, benefits, role, impact, and components of VPN technology.