CCNP ENCOR (350-401) QUESTIONS WITH PASSED ANSWERS!!
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CCNP ENCOR
Institution
CCNP ENCOR
Core layer - ️️In a campus LAN design, the switches that connect the distribution
layer switches, and to each other, to provide connectivity between the various
distribution layer switches.
What is a Service Level Agreement? - ️️The promise you make to your users about
how long a system...
CCNP ENCOR (350-401)
Core layer - ✔️✔️In a campus LAN design, the switches that connect the distribution
layer switches, and to each other, to provide connectivity between the various
distribution layer switches.
What is a Service Level Agreement? - ✔️✔️The promise you make to your users about
how long a system will be down in the event of a disaster
What is fault tolerance? - ✔️✔️The ability of a device to continue operation if one of it's
components fails
Distribution Layer - ✔️✔️Access layer switches connect to distribution layer switches
Recovery Time Objective (RTO) - ✔️✔️The Maximum amount of time a system will be
offline after a disaster
Recovery Point Objective (RPO) - ✔️✔️The Maximum amount of data that can be lost
due to a disaster.
Mean Time Between Failures (MTBF) - ✔️✔️The Average amount of time before a
product fails.
Mean Time to Repair (MTTR) - ✔️✔️The average amount of time required to repair a
failed product.
Access Layer - ✔️✔️This is essentially the Access layer into the network where end
devices usually connect to
Collapsed Core Topology - ✔️✔️A Two Tier topology where the core and distribution
layers have been consolidated.
What 3 layers are in a traditional topology - ✔️✔️Access layer, distribution layer, Core
layer.
What topology is used within data centers? - ✔️✔️Spine leaf design
What is the Leaf switch layers? - ✔️✔️Different Nodes (servers) may be connected to
these device in redundancy.
,What are spine switches? - ✔️✔️Every leaf is connected to every spine switch for
redundancy, and the maximum hops for nodes ae nly a single hop over spin switches.
Characteristics of having a Cloud Data Center? - ✔️✔️With A Cloud deployment
there's not need to maintain local redundancy
With A cloud deployment, you pay for resource usage instead of purchasing physical
hardware
What are three good fabric capacity planning questions? - ✔️✔️How much data do we
need to push through a data center switch?
How much data can we push through a specific hardware configuration?
What is the anticipated bandwidth demand increase over time?
What are "The 5 nines of availability" - ✔️✔️up 99.999 percent uptime, approximately.
5 min downtime/ year.
Limiting a networks down to more than 5 minutes per year.
What are four aspects of Redundant design? - ✔️✔️- Usually higher cost
- Redundant UPS/Generator
- Redundant Cables for uplinks
- Redundant routing for outages
What is a "full" backup? - ✔️✔️a complete backup of all your data.
What is a "Differential" backup? - ✔️✔️Backs up files that have been changed since
last FULL backup.
easier to restore than incremnetal
What is a "Incremental" backup? - ✔️✔️Only new files or ones that have changed
since the last backup are saved in order to save time.
What is a "Snapshot" backup? - ✔️✔️Type of backup primarily used to capture the
entire operating system image including all applications and data
In Redundant Design, what is a Cold Site? - ✔️✔️This is a site that doesn't contain any
gear, but already has - -- Power
- HVAC
- Floor space
In Redundant Design, what is a Warm site? - ✔️✔️This is a site that had network
hardware ready to go, but backups need to upload to recover to have this site fully
functioning
,- Power
- HVAC
- Floor space
- Server Hardware
In Redundant Design, what is a Hot Site? - ✔️✔️This site is Real-time synchronized,
replicated with computers at hot sight.
- Power
- HVAC
- Floor Space
- Server Hardware
- Synchronized Data
What are some High Availability FHRP? - ✔️✔️an FRHP is a First Hop Redundancy
Protocol
GLBP
VRRP
HSRP
What is VRRP? - ✔️✔️VRRP is the Internet Standard for router redundancy and has
the same functions as HSRP.
What is GLBP? - ✔️✔️- Global Load Balancing Protocol
- Cisco proprietary
- Two main roles: AVG (Active Virtual GW) & AVF (Active Virtual Forwarder).
The AVG - Responds to ARP Queries for the MAC address of the default gateway.
The AVF - Responsible to forward packets upstream
Routing can be configured for round robin, or weighted.
What is HSRP? - ✔️✔️HSRP provides gateway redundancy for hosts in a specific
subnet and this is done by having routers provide a virtual IP to hosts. HSRP is also
Cisco proprietary.
One router is in a Hot - Active mode
One router is a Standby - Ready mode once the hot device goes offline.
What is Stateful Switchover (SSO)? - ✔️✔️Previously A Router by default has two
processors inside of it. by default if a route processor 1 were to fail, route process 2
would take over but it wouldn't have the same knowledge of the other one, so it would
need to relearn.
Using SSO, we use Non-stop forwarding which makes the routing information
maintained by CEF synchronize to backup route processor. This way when the
switchover occur the backup process will know the adjacencies, and routing information.
, What is an "Autonomous" Access Point within a wireless deployment? - ✔️✔️This is a
Controller-less deployment model of an an AP.
Device's are Managed indiviudally
What is a "Lightweight" Access Point within a wireless deployment? - ✔️✔️This AP
Requires A central wireless LAN Controller (WLC), in order to control the device.
- The Controller communicates changes to the APs
Distributed WLC Deployment - ✔️✔️Access points deployed in different buildings with
WLC's which are provided locally to those AP's
Centralized Deployment - ✔️✔️Having a Centralized site where AP's communicating
off site to a data Center
Cloud WLC Deployment - ✔️✔️Having AP's communicating to a Virtualization WLC in
the cloud
Remote branch WLC Deployment - ✔️✔️Have a branch office with Wireless Ap's
installed communicate over the WAN to a Data center.
What is Client Density? - ✔️✔️The number of clients in a wireless coverage area.
has an inverse relationship. The higher the number of clients, the poorer the network
performance for each client.
What characteristics would you want to look at before selecting the number of APs? -
✔️✔️· Specs of the AP
· The wireless standard(s)
· Anticipated number of simultaneous communication streams
· Bandwidth demand of applications
What characteristics should you look into increasing the density of clients your AP's can
handle? - ✔️✔️· Increasing number of Aps
· Reducing Tx power of Aps
· Reducing number of bonded channels.(lowering channel width)User Wi-Fi 6E (If
supported by clients- Large amounts of overlapping channels)
What is used to operate the infrastructure in a "campus fabric"? - ✔️✔️- Virtual Overlay
network
- Ideally used with Cisco DNA Center
- NETCONF/YANG Management
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