Cisco : 200-125 Questions & Answers

1Describe the routing concepts
a)Packet handling along the path through a network
b)Forwarding decision based on route lookup
c)Frame rewrite

2Interpret the components of a routing table
a)Prefix
b)Network mask
c)Next hop
d)Routing protocol code
e)Administrative distance
f)Metric
g)Gateway of last resort

3 Describe how a routing table is populated by different routing information sources
a)Admin distance

4Configure, verify, and troubleshoot inter-VLAN routing
a)Router on a stick
b)SVI

5Compare and contrast static routing and dynamic routing

6Compare and contrast distance vector and link state routing protocols

7Compare and contrast interior and exterior routing protocols

8Configure, verify, and troubleshoot IPv4 and IPv6 static routing
a)Default route
b)Network route
c)Host route
d)Floating static

9Configure, verify, and troubleshoot single area and multi-area OSPFv2 for IPv4 (excluding authentication, filtering, manual summarization, redistribution, stub, virtual-link, and LSAs)

10Configure, verify, and troubleshoot single area and multi-area OSPFv3 for IPv6 (excluding authentication, filtering, manual summarization, redistribution, stub, virtual-link, and LSAs)

11Configure, verify, and troubleshoot EIGRP for IPv4 (excluding authentication, filtering, manual summarization, redistribution, stub)

12Configure, verify, and troubleshoot EIGRP for IPv6 (excluding authentication, filtering, manual summarization, redistribution, stub)

13Configure, verify, and troubleshoot RIPv2 for IPv4 (excluding authentication, filtering, manual summarization, redistribution)

14Troubleshoot basic Layer 3 end-to-end connectivity issues

1Configure and verify PPP and MLPPP on WAN interfaces using local authentication

2Configure, verify, and troubleshoot PPPoE client-side interfaces using local authentication

3Configure, verify, and troubleshoot GRE tunnel connectivity

4Describe WAN topology options
a)Point-to-point
b)Hub and spoke
c)Full mesh
d)Single vs dual-homed

5Describe WAN access connectivity options
a)MPLS
b)Metro Ethernet
c)Broadband PPPoE
d)Internet VPN (DMVPN, site-to-site VPN, client VPN)

6Configure and verify single-homed branch connectivity using eBGP IPv4 (limited to peering and route advertisement using Network command only)

7Describe basic QoS concepts
a)Marking
b)Device trust
c)Prioritization
c.[i] Voice
c.[ii] Video
c.[iii] Data
d)Shaping
e)Policing
f)Congestion management

1Describe and verify switching concepts
a)MAC learning and aging
b)Frame switching
c)Frame flooding
d)MAC address table

2Interpret Ethernet frame format

3Troubleshoot interface and cable issues (collisions, errors, duplex, speed)

4.Configure, verify, and troubleshoot VLANs (normal/extended range) spanning multiple switches
a)Access ports (data and voice)
b)Default VLAN

5Configure, verify, and troubleshoot interswitch connectivity
a)Trunk ports
b)Add and remove VLANs on a trunk
c)DTP, VTP (v1&v2), and 802.1Q
d)Native VLAN

6Configure, verify, and troubleshoot STP protocols
a)STP mode (PVST+ and RPVST+)
b)STP root bridge selection

7Configure, verify and troubleshoot STP related optional features
a)PortFast
b)BPDU guard

8Configure and verify Layer 2 protocols
a)Cisco Discovery Protocol
b)LLDP

9Configure, verify, and troubleshoot (Layer 2/Layer 3) EtherChannel
a)Static
b)PAGP
c)LACP

10Describe the benefits of switch stacking and chassis aggregation

1Describe DNS lookup operation

2Troubleshoot client connectivity issues involving DNS

3Configure and verify DHCP on a router (excluding static reservations)
a)Server
b)Relay
c)Client
d)TFTP, DNS, and gateway options

4Troubleshoot client- and router-based DHCP connectivity issues

5Configure, verify, and troubleshoot basic HSRP
a)Priority
b)Preemption
c)Version

6Configure, verify, and troubleshoot inside source NAT
a)Static
b)Pool
c)PAT

7Configure and verify NTP operating in a client/server mode

1 Compare and contrast OSI and TCP/IP models

2 Compare and contrast TCP and UDP protocols

3 Describe the impact of infrastructure components in an enterprise network
a) Firewalls
b) Access points
c) Wireless controllers

4 Describe the effects of cloud resources on enterprise network architecture
a) Traffic path to internal and external cloud services
b) Virtual services
c) Basic virtual network infrastructure

5Compare and contrast collapsed core and three-tier architectures

6 Compare and contrast network topologies
a)Star
b)Mesh
c)Hybrid

7Select the appropriate cabling type based on implementation requirements

8Apply troubleshooting methodologies to resolve problems
a)Perform and document fault isolation
b)Resolve or escalate
c)Verify and monitor resolution

9Configure, verify, and troubleshoot IPv4 addressing and subnetting

10Compare and contrast IPv4 address types
a)Unicast
b)Broadcast
c)Multicast

11 Describe the need for private IPv4 addressing

12Identify the appropriate IPv6 addressing scheme to satisfy addressing requirements in a LAN/WAN environment

13Configure, verify, and troubleshoot IPv6 addressing

14Configure and verify IPv6 Stateless Address Auto Configuration

15Compare and contrast IPv6 address types
a)Global unicast
b)Unique local
c)Link local
d)Multicast
e)Modified EUI 64
f)Autoconfiguration
g)Anycast

1Configure and verify device-monitoring protocols
a)SNMPv2
b)SNMPv3
c)Syslog

2Troubleshoot network connectivity issues using ICMP echo-based IP SLA

3Configure and verify device management
a)Backup and restore device configuration
b)Using Cisco Discovery Protocol or LLDP for device discovery
c)Licensing
d)Logging
e)Timezone
f)Loopback

4Configure and verify initial device configuration

5Perform device maintenance
a)Cisco IOS upgrades and recovery (SCP, FTP, TFTP, and MD5 verify)
b)Password recovery and configuration register
c)File system management

6Use Cisco IOS tools to troubleshoot and resolve problems
a) Ping and traceroute with extended option
b)Terminal monitor
c)Log events
d)Local SPAN

7Describe network programmability in enterprise network architecture
a)Function of a controller
b)Separation of control plane and data plane
c)Northbound and southbound APIs

1Configure, verify, and troubleshoot port security
a)Static
b)Dynamic
c)Sticky
d)Max MAC addresses
e)Violation actions
f)Err-disable recovery

2Describe common access layer threat mitigation techniques
a)802.1x
b)DHCP snooping
c)Nondefault native VLAN

3Configure, verify, and troubleshoot IPv4 and IPv6 access list for traffic filtering
a)Standard
b)Extended
c)Named

4Verify ACLs using the APIC-EM Path Trace ACL analysis tool

5Configure, verify, and troubleshoot basic device hardening
a)Local authentication
b)Secure password
c)Access to device
c.[i] Source address
c.[ii] Telnet/SSH
d)Login banner

6Describe device security using AAA with TACACS+ and RADIUS