CCST Networking Certification Prep Course

Trace how HTTP data is built from application data through TCP, IP, and Ethernet. See how the physical layer serializes frames and how each layer strips its PDU on arrival.

Explore how network layer logical addressing uses subnets, VLANs, and routing to reach devices across multilayer switches and routers, with private RFC 1918 addresses and NAT to public space.

See a wireshark trace of a browser request to webapp.com across a simple topology, capturing the physical, ethernet, ipv4, tcp, and http layers from the get request to port 80.

Explore the difference between bandwidth and throughput, and how latency, packet size, and half duplex shape practical data transfer and network performance.

Configure an ftp server by creating a ccna admin user with read, write, delete, rename, and list permissions, then connect, list files, and transfer files using get and put.

Learn to set up a TFTP server to back up the EOS image and startup configuration, and to copy files for upgrades using show flash and copy commands.

Sftp provides in-transit encryption for secure file transfer using ssh. It uses a single tcp port 22, supports password or public/private key authentication, and enables remote file management.

Perform DNS troubleshooting in a two-subnet lab by configuring tcp/ip, pinging the DNS server to verify connectivity, and using nslookup to confirm resolution of web server.com before loading the page.

Understand Cisco physical device ports and link lights, diagnose duplex or speed mismatches on layer two links, and identify copper and fiber data ports with console, USB, and WAN management.

Wire a data rack from hosts to the data center rack, using copper cabling to patch panels and layer two and layer three switches, with fiber to the router.

Understand how frame switching uses MAC addresses and VLANs to forward Ethernet frames within a data center. Distinguish access switches (layer 2) from multilayer switches handling routing between VLANs.

Configure vty lines for telnet and ssh, set passwords and login, and apply a five-minute exec timeout; test connectivity by telnetting from a host to each router.

Trace the host-to-server path with traceroute (tracert on windows), view per-hop addresses and the default gateway, and note how UDP-based Cisco traceroute compares to ICMP tracert and OSPF cost.

Inspect a router interface with show interface to view physical and data link status, address details, and speed settings, then monitor five-minute input and output rates for troubleshooting.

Verify Cisco privilege levels from 0 to 15, including unconfigured devices at 15 and user exec at 1; learn to set enable levels with enable and config t.

Configure local authentication on a Cisco router by creating an admin account (privilege 15) with password CCNa labs, enabling login local on vty and console, and enabling service password encryption.

Explore security zones from inside private networks to public interfaces and dmzs, using acLs, firewalls, and network address translation, with authentication and authorization securing server access.

Learn how a firewall in the forwarding path can affect ping and traceroute, and how enabling ICMP through a Cisco firewall lets you verify connectivity up to the application layer.