Download Implementing Cisco Enterprise Network Core Technologies (350-401 ENCOR).350-401.CertDumps.2021-07-15.102q.vcex

When using Ternary Content Addressable Memory (TCAM) inside routers it’s used for faster address lookup that enables fast routing.  In switches Content Addressable Memory (CAM) is used for building and lookup of mac address table that enables L2 forwarding decisions.  Besides Longest-Prefix Matching, TCAM in today’s routers and multilayer Switch devices are used to store ACL, QoS and other things from upper-layer processing.

According to this Cisco link (Table 5), the following ports are from Cisco DNA Center to fabric underlay switches: TCP 22: From Cisco DNA Center to fabric switches’ loopbacks for SSH TCP 23: From Cisco DNA Center to fabric switches’ loopbacks for TELNET UDP 161: From Cisco DNA Center to fabric switches’ loopbacks for SNMP device discovery ICMP: From Cisco DNA Center to fabric switches’ loopbacks for SNMP device discovery TCP 443: From Cisco DNA Center to fabric switches for software upgrades (also to the internet if there is no proxy)  UDP 6007: From Cisco DNA Center to switches and routers for NetFlow UDP 123: From Cisco DNA Center to fabric switches for the initial period during LAN automation So in fact there are three correct answers for this question, including TCP 23, ICMP and UDP 6007 but  there are two best answers TCP 23 and ICMP (which match “fabric switches” in the question).

Control-Plane Nodes – Map System that manages Endpoint to Device relationships  Fabric Border Nodes – A Fabric device (e.g. Core) that connects External L3 network(s) to the SDA Fabric  Fabric Edge Nodes – A Fabric device (e.g. Access or Distribution) that connects Wired Endpoints to the SDA Fabric  Fabric Wireless Controller – A Fabric device (WLC) that connects APs and Wireless Endpoints to the SDA Fabric  Reference: https://www.cisco.com/c/dam/m/hr_hr/training-events/2019/cisco-connect/pdf/VH-Cisco-SD-Access-Connecting.pdf

From the output we see DSW2 is running in RSTP mode (in fact Rapid PVST+ mode as Cisco does not support RSTP alone). When a new switch running PVST+ mode is added to the topology, they keep running the old STP instances as RSTP (in fact Rapid PVST+) is compatible with PVST+.

A next generation firewall adds additional features such as application control, integrated intrusion prevention (IPS) and often more advanced threat prevention capabilities like sandboxing.

The stratum levels define the distance from the reference clock. A reference clock is a stratum 0 device that is assumed to be accurate and has little or no delay associated with it. Stratum 0 servers cannot be used on the network but they are directly connected to computers which then operate as stratum-1 servers. A stratum 1 time server acts as a primary network time standard.        A stratum 2 server is connected to the stratum 1 server; then a stratum 3 server is connected to the stratum 2 server and so on. A stratum 2 server gets its time via NTP packet requests from a stratum 1 server. A stratum 3 server gets its time via NTP packet requests from a stratum-2 server…

If you have Cisco SD-Access implemented and DNA Center becomes unreachable then the wired and wireless network will continue to forward packets as usual. There will be no impact to network performance or behavior. Yes you will be able to SSH / telnet / console into switches and wireless network infrastructure as usual. For the period DNA Center is unreachable, Assurance data will be lost,and you will not be able to make configuration changes to the Cisco SD-Access network.

An Egress Tunnel Router (ETR) connects a site to the LISP-capable part of a core network (such as the Internet), publishes EID-to-RLOC mappings for the site, responds to Map-Request messages, and decapsulates and delivers LISP-encapsulated user data to end systems at the site.  A LISP proxy ETR (PETR) implements ETR functions on behalf of non-LISP sites. A PETR is typically used when a LISP site needs to send traffic to non-LISP sites but the LISP site is connected through a service provider that does not accept nonroutable EIDs as packet sources. PETRs act just like ETRs but for EIDs that send traffic to destinations at non-LISP sites.

The VMX file simply holds the virtual machine configuration.  VMDK (short for Virtual Machine Disk) is a file format that describes containers for virtual hard disk drives to be used in virtual machines like VMware Workstation or VirtualBox.  An OVA file is an Open Virtualization Appliance that contains a compressed, “installable” version of a virtual machine. When you open an OVA file it extracts the VM and imports it into whatever virtualization software you have installed on your computer.