 deploy WA SDN at headquarters. MPLS's primary advantage is that it prioritizes voice and video using bits in the MPLS label. Its disadvantage is the long lead time needed to configure and implement the service. However, once it's in place, MPLS does have advantages in that it prioritizes www.TechnicalPDF.com voice and video. WA SDNs are able to control which traffic goes over the MPLS service SO that MPLS links are integrated via control plane signaling into the SDN network. See Table 5-1 for a comparison of broadband services. Table 5-1 A Comparison of Broadband Services* Gigabit Dedicated Ethernet Wavelength Carrie Carriers Managed manage manag network customer traffic To secure priorit prioritiz site-to-site attain guarantee e voice & remote speeds up access over speeds to a 1,000 route video of 100 to Gigabits traffic between Internet (1 TB) offices Gigabits Compl Costly, Speed not Can carry ex to limited guaranteed carry install; capacity , low cost traffic routes traffic applic ations www.TechnicalPDF.com *For additional broadband services, see Table 5-2 in the "Appendix." **Layer 2-Data layer of the Open System Interconnection (OSI)-The protocol of transferring data between networks. Implementing WA SDN-Staff Buy in a Challenge A major challenge in implementing WA SDN service at enterprises is IT employee resistance due to fears of being laid off because some operations are automated. There is additionally often a lack of expertise to manage WA SDN service. This is because once automation is operational, fewer employees may be required to implement changes that are now automated. Additionally, some organizations hire their telephone company to implement and manage some or all of WA SDN's functions. Moreover, SDN is new and requires new skills to program scripts for automation and knowledge of orchestration. Another issue is that employees that manage the service might not have the authority to implement needed, more costly features. This creates delays and confusion. Network Backups-Protection from Outage