Cisco 300-320 Braindumps 2021

NEW QUESTION 1
A large scale IP SLA deployment is causing memory and CPU shortages on the routers in an enterprise network. Which solution can be implemented to mitigate these issues?

• A. a shadow router
• B. a CPE device that is managed by the network provider
• C. a standby router for failover operation
• D. an offline router for disaster recovery

Answer: A

NEW QUESTION 2
A network manager wants all remote sites to be designed to communicate dynamically with each other using DMVPN technology without requiring much configuration on the spoke routers. DMVPN uses which protocol to achieve this goal?

• A. GRE
• B. NHRP
• C. SSH
• D. ARP

Answer: B

NEW QUESTION 3
What to configure in BGP so that other BGP neighbours cannot influence the path of a route.

• A. Lower MED
• B. Higher Local pref
• C. Higher weight
• D. Lower router ID

Answer: C

Explanation: The list of the selection criteria is presented below in the same order in which BGP uses them to select the optimal routes to be injected into the IP Routing table:
https://www.noction.com/blog/bgp_bestpath_selection_algorithm
1) Weight — weight is the first criterion used by the router and it is set locally on the user’s router. The Weight is not passed to the following router updates. In case there are multiple paths to a certain IP address, BGP always selects the path with the highest weight. The weight parameter can be set either through neighbour command, route maps or via the AS-path access list.
2) Local Preference — this criterion indicates which route has local preference and BGP selects the one with the highest preference. Local Preference default is 100.
3) Network or Aggregate — this criterion chooses the path that was originated locally via an aggregate or a network, as the aggregation of certain routes in one is quite effective and helps to save a lot of space on the network.
4) Shortest AS_PATH — this criterion is used by BGP only in case it detects two similar paths with nearly the same local preference, weight and locally originated or aggregate addresses.
5) Lowest origin type — this criterion assigns higher preference to Exterior Gateway Protocol (EGP) and lower preference to Interior Gateway Protocol (IGP).
6) Lowest multi-exit discriminator (MED) — this criterion, representing the external metric of a route, gives preference to the lower MED value.
7) eBGP over iBGP — just like the “Lowest origin type” criterion, this criterion prefers eBGP rather than iBGP.
8) Lowest IGP metric — this criterion selects the path with the lowest IGP metric to the BGP next hop.
9) Multiple paths — this criterion serves as indication whether multiple routes need to be installed in the routing table.
10) External paths — out of several external paths, this criterion selects the first received path.
11) Lowest router ID — this criterion selects the path which connects to the BGP router that has the lowest router ID.
12) Minimum cluster list — in case multiple paths have the same router ID or originator, this criterion selects the path with the minimum length of the cluster list.
13) Lowest neighbour address — this criterion selects the path, which originates from the lowest neighbour address.
On eBGP router with single-homed (connected to single ISP with single router and multiple links) or dual-homed (connected to single ISP with dual router) topology, the route could be influenced by ISP by
tuning the MED attribute (as we know MED is the attribute which is exchanged between eBGP peers), also we could influence the route advertised to our ISP by tuning the same metric - MED.
On eBGP router with multi-homed (connected to multiple ISPs) topology the MED attribute won't work anymore.
On iBGP router with single-homed, dual-homed or multi-homed (doesn't really matter as we are talking about iBGP peer) the route can be influenced by tuning the Local Preference attribute (as we know Local Preference is the attribute which is exchanged between iBGP peers).
Now, no matter what router we are on (eBGP or iBGP) and no matter what topology we are using (single-homed, dual-homed, multi-homed) if we don't want to our BGP neighbors to influence the route
choice, we can configure higher Weight attribute (for that route) locally on the router and no matter what the
other routers do, they can not change it.

NEW QUESTION 4
What added enforcement feature is available on IDS-based devices to terminate active malicious traffic?

• A. Signature detection
• B. TCP reset
• C. SNMP alert
• D. Layer 4 filtering

Answer: B

NEW QUESTION 5

Refer to the exhibit. A customer wants to use HSRP as a First Hop Redundancy Protocol. Both routers are currently running and all interfaces are active. Which factor determines which router becomes the active HSRP device?

• A. the router with the highest MAC address for the respective group
• B. the router with the highest IP address for the respective group
• C. the router that boots up last
• D. the router with the highest interface bandwidth for the respective group

Answer: B

NEW QUESTION 6
the states that the designer want to use the three PIM-SM kinds and which one is true about bidirectional pim

• A. three of them cannot be used at the same time
• B. source has to be expelicitly mentioned
• C. The RP donot need IP address
• D. the RP ip address can be shared by other interface

Answer: D

NEW QUESTION 7
Which is backup WAN connected with secured connection?

• A. DMVPN
• B. GRE over IPSec

Answer: B

NEW QUESTION 8
When APIC is down on cluster device ... What is the minimum number of APICs requirement for a production ACI Fabric to continue to operate?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: C

Explanation: From Designing for Cisco Network Service Architecture Fourth Edition: The recommended minimum sizing has the following requirements:
* Three or more Cisco APIC controllers that are dual connected to different leaf switches for maximum resilience. Note that the fabric is manageable even with just one controller and operational without a controller.

NEW QUESTION 9
The Cisco ACI fabric consists of which design at the physical layer?

• A. three-tier core, aggregation, and access
• B. collapsed core network
• C. full mesh
• D. spine-and-leaf

Answer: D

NEW QUESTION 10
In what situation must spanning-tree be implemented?

• A. When redundant Layer 2 links, that are not part of a single EtherChannel or bundle, exist between distribution switches
• B. When redundant Layer 3 links, that are not part of a single EtherChannel or bundle, exist between distribution switches
• C. Between Distribution and Core switches when interfaces are configured with "no switchport"
• D. Between Distribution and Core switches when VSS is configured

Answer: A

NEW QUESTION 11
Which feature is a fundamental process of the Cisco TrustSec technology?

• A. marking
• B. detection
• C. prioritization
• D. propagation

Answer: D

NEW QUESTION 12
A client request includes a network design that ensures all connections between the access layer and distribution layer are active and forwarding traffic at all times. Which design approach achieves this request?

• A. Enable backbone fast on the two distribution switches and create a port channel between each access layer switch and both distribution switches
• B. Configure HSRP for all VLANs and adjust the hello timer for faster convergence
• C. Configure Rapid PVST+ and adjust the timers for fast convergence
• D. Create a VSS between the two distribution switches and also create a MEC between the VSS and each access layer switch.

Answer: D

NEW QUESTION 13
For which engine an IPS can use its reputation awareness? (Choose two)

• A. Reputation filtering
• B. Reputation subscriptions
• C. Correlation rules
• D. Global correlation inspection

Answer: AC

Explanation: https://www.cisco.com/c/en/us/td/docs/security/firepower/60/configuration/guide/fpmc-config-guide-v60/Correl Correlation rules -> Connection Tracker -> URL Reputation

NEW QUESTION 14
Cisco FabricPath brings the benefits of routing protocols to Layer 2 network Ethernet environments. What are two advantages of using Cisco FabricPath technology? (Choose two)

• A. Cisco FabricPath relies on OSPF to support Layer 2 forwarding between switches, which allows load balancing between redundant paths.
• B. Cisco FabricPath provides MAC address scalability with conversational learning.
• C. Loop mitigation is provided by the TTL field in the frame.
• D. Cisco FabricPath is IETF-standard and is not used with Cisco products.
• E. Cisco FabricPath technology is supported in all Cisco platforms and can replace legacy Ethernet in all campus networks.

Answer: BC

NEW QUESTION 15
Which protocol is required for end-to-end signaling in an IntServ QoS architecture?

• A. RSVP
• B. DSCP
• C. ToS
• D. LLQ
• E. DiffServ

Answer: A

NEW QUESTION 16
While designing a QoS policy for an organization, a network engineer is determining the method to limit the output rate of traffic whit in the real-time queue. How must the limiting of traffic within the real-time queue occur?

• A. The traffic must be remarked to a low priority to and allowed pass
• B. The traffic must be policed and not allowed to pass
• C. The traffic within the real-time queue must not be limited
• D. The traffic must be shaped to allow for it to be transmitted after the tokens have been replenished

Answer: C

NEW QUESTION 17
A data center is being deployed, and one design requirement is to be able to readily scale server virtualization. Which IETF standard technology can provide this requirement?

• A. Transparent interconnection of Lots of Links
• B. data center bridging
• C. cisco fabric path
• D. cisco unified fabric

Answer: A