There are a tremendous number of protocols used to build a network, and most of these protocols are required to allow a network to pass traffic. However, in order for an engineer to maintain a quality and highly available network, you need additional protocols to help manage the network itself. In this course, Network Services for Cisco CCNA 200-125/200-105, you'll examine services an engineer can use to help improve the network. First, you'll learn protocols and services that provide redundancy, quality of service, centralized authentication, network monitoring, and vitalized networking. Additionally, you'll learn how to implement Hot Standby Router Protocol (HSRP) in a small network, which will allow an engineer to provide a redundant default gateway. Finally, you'll discover how you can use SNMP and IP SLA to monitor a network. Since Software Defined Networking (SDN) has been implemented in real products now, you'll examine Cisco's products for SDN including terminology used to describe the system. By the end of this course, you'll be able to implement a redundant default gateway using HSRP, create an IP SLA ICMP policy, and understand how Cisco has implemented SDN.