500-470 Exam Dumps : Cisco Enterprise Networks SDA, SDWAN and ISE Exam for System Engineers

The Cisco V-Edge Router performs QoS traffic classification on the ingress interface, before the traffic enters the VPN. The classification is based on the match criteria specified in the access lists, which can include the source and destination IP addresses, ports, protocols, DSCP values, and application-aware NBAR attributes. The classification results in assigning a forwarding class and a QoS group to each packet. The forwarding class determines the output queue and the scheduling policy for the packet on the egress interface. The QoS group is an internal label that can be used to remark the DSCP value of the packet or to match the packet in another access list for further processing. References:

• : Forwarding and QoS Configuration Guide for vEdge Routers, Cisco SD-WAN Release 20, Chapter 2: Configuring Localized Data Policy, https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/qos/vEdge-20-x/qos-book/localized-data-policy.html#id_1050591
• : Cisco SD-WAN Design Guide, Release 20, Chapter 6: Quality of Service, https://www.cisco.com/c/en/us/td/docs/solutions/CVD/SDWAN/2020/b_SD-WAN_Design_Guide_Aug_2020/b_SD-WAN_Design_Guide_Aug_2020_chapter_0110.html2

Some of the statements that are true regarding Cisco SD-WAN license tiers are:

• With Pro license, control and data policies are supported2. This license tier enables network operators to define and enforce policies for traffic shaping, quality of service (QoS), application optimization, and security2.
• With Plus license, split-tunnel is supported3. This license tier enables network operators to use split-tunneling technology to route traffic through different paths based on application or user preferences3.
• With Enterprise license, vAnalytics is included4. This license tier enables network operators to use vAnalytics feature to collect and analyze data from various sources such as endpoints, applications, devices, networks, and cloud services4.

 A WAN design is a plan for how to connect multiple sites or locations over a wide area network (WAN). A WAN design can have various benefits, depending on the goals and requirements of the organization. Two of the possible benefits from a WAN design are:

• Ensure remote site uptime: A WAN design can help to ensure that remote sites or branches have reliable and consistent connectivity to the central site or the cloud. This can improve the availability and performance of critical applications and services, such as voice, video, collaboration, and data backup. A WAN design can also provide redundancy and resiliency in case of network failures or disasters, by using multiple WAN links, backup routes, or failover mechanisms. For example, SD-WAN is a WAN design that uses software to dynamically route traffic over the best available WAN link, based on the network conditions and the application requirements1.
• Prioritize and secure with granular control: A WAN design can also help to prioritize and secure the traffic and applications that flow over the WAN. This can enhance the quality of service (QoS) and the security of the network. A WAN design can use various techniques, such as traffic shaping, policy-based routing, encryption, firewall, or VPN, to classify, prioritize, and secure the WAN traffic according to the business needs and the security policies. For example, TrustSec is a WAN design that uses software-defined segmentation to enforce granular access policies based on the identity and context of users, devices, and applications2.

The other options, provide lower quality service to guest users, reduce cost and increase operational complexity, and lower circuit bandwidth requirements, are not benefits from a WAN design. Providing lower quality service to guest users is not a desirable outcome, as it can affect the user experience and the reputation of the organization. Reducing cost and increasing operational complexity is a trade-off that may not be worth it, as it can create more challenges and risks for the network management and maintenance. Lowering circuit bandwidth requirements is not a benefit in itself, but a means to achieve other benefits, such as reducing cost or improving performance. A WAN design should aim to optimize the bandwidth utilization and allocation, rather than simply lowering it. References := : 1: Cisco SD-WAN Solution Design Guide (CVD) - Cisco1, 2: Cisco TrustSec Solution Overview - Cisco