Serial - Data Communication Equipment (DCE)

Serial - Data Terminal Equipment(DTE)

Serial - Link between two routers


When configuring a Serial interface on a Cisco router, the clock rate must be configured on the device acting as a [DCE](/serial-data-communication-equipment-dce) side of the link.  The clock rate must not be configured on the [DTE](/serial-data-terminal-equipmentdte) side of the link, otherwise it can create a fault in the syncing of the link communication.

## Links

https://networklessons.com/frame-relay/cisco-frame-relay-switch-configuration#Configuration
https://networklessons.com/cisco/ccna-200-301/cisco-ios-router-basic-configuration#Interfaces

Serial Interface - Clock Rate

STP cost short mode

STP determining blocked port using cost

STP direct vs indirect link failure

STP fine tuning the spanning tree protocol

STP how a switch identifies a BPDU

STP how to find the root bridge

STP interface type

STP prio nbr value

STP topology change process

Security - 802.1x with WLC and AAA server

Security - AAA for RESTCONF

Security - Best Practices for Repurposing Network Devices

Security - Cisco AnyConnect Secure Mobility Client

Security - Cisco Secure Client

Security - Cisco VPN Client

Security - Cisco VPN client software

Security - Diffie-Hellman groups

Security - Extensible Authentication Protocol over LAN (EAPOL)

Security - GETVPN

Security - IEEE 802.1X

Security - IOS Usernames and Passwords

Security - IPsec nonce

Security - Kerberos

Security - MAC Authentication Bypass

Security - Network Access Control (NAC)

Security - Next Generation Firewall

Security - Secure Unique Device Identifier (SUDI)

Security - WPA 4-way handshake

Security - WebVPN

Security - accessing VTY from another VRF

Security - assigning privilege levels, syntax and behavior

Security - bogons

Security - broadcast-multicast storm

Security - configuring TACACS from another VRF

Security - privilege levels and command output

Security - privilege levels and enable keyword

Security - public key exchange

Security - root CAs and private keys

Security - spoofing

Security - storm control algorithm

Security IKE policy hash command

Security Trusted Platform Module (TPM)

Security aaa new-model

Security authentication on VTY lines

Security keyrings

Segment Routing

Serial Interface default broadcast address

Session Border Controller

Session Initiation Protocol

Show open TCP-UDP ports on Cisco router

Spanning Tree Portfast Configuration Options

Spanning Tree Protocol (STP)

Spine and leaf architecture - connections to leaf switches

Spine and leaf architecture - connections to spine switches

Spine and leaf architecture - reducing latency

Split-horizon

StackWise - IOS upgrade switch reboot sequence

StackWise Virtual

Stackwise - IOS install mode vs bundle mode

Stackwise election process

Stackwise user priority

Static ARP entry for own IP address

Subscriber templating

Summarization

Supernetting

Switch High Availability and the Control Plane

Switch configuring a routed port

Switch high availability options

Switch protected port limitations

Switch protected port

Switched Virtual Interface (SVI)

Switching -  CEF Adjacency Table

Switching - CEF

Switching - Media Access Control (MAC) addresses

Switching - Process switching

Switching - backplane

Switching - cut through

Switching - fast switching

Switching - show cable-diagnostics

Switching - store and forward

Switching - switch fabric

Switching - switchport autostate command

Switching

Switchport - IEEE 802.1q

Switchport - ISL

Switchport - show vlan internal usage

Switchport access

Switchport modes

Switchport trunk configuration ignores access commands

Switchport trunk encapsulation

Switchport trunk

Symmetric Digital Subscriber Line (SDSL)

Syslog - Logging buffered command

Syslog - logging discriminator

Syslog - terminal monitor

Syslog relay or proxy

Serial Interface - Clock Rate

Links

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