- (Exam Topic 3)
Refer to the exhibit A network engineer received a call from the vendor for a failed attempt to remotely log in to their managed rooter loopback interface from 192 168.40 15 Which action must the network engineer take to resolve the issue?
Correct Answer:
C
- (Exam Topic 1)
Drag and drop the packet types from the left onto the correct descriptions on the right.
Solution:
Unlike legacy network technologies such as ISDN, Frame Relay, and ATM that defined separate data and control channels, IP carries all packets within a single pipe. Thus, IP network devices such as routers and
switches must be able to distinguish between data plane, control plane, and management plane packets to treat each packet appropriately.From an IP traffic plane perspective, packets may be divided into four distinct, logical groups:1. Data plane packets – End-station, user-generated packets that are always forwarded by network devices to other end-station devices. From the perspective of the network device, data plane packets always have a transit destination IP address and can be handled by normal, destination IP address-based forwarding processes.2. Control plane packets – Network device generated or received packets that are u for the creation and operation of the network itself. From the perspective of the network device, control plane packets always have a receive destination IP address and are handled by the CPU in the network device route processor. Examples include protocols such as ARP, BGP, OSPF, and other protocols that glue the network together.3. Management plane packets – Network device generated or received packets, or management station generated or received packets that are used to manage the network. From the perspective of the network device, management plane packets always have a receive destination IP address and are handled by the CPU in the network device route processor. Examples include protocols such as Telnet, Secure Shell (SSH), TFTP, SNMP, FTP, NTP, and other protocols used to manage the device and/or network.4. Services plane packets – A special case of data plane packets, services plane packets are also user-generated packets that are also forwarded by network devices to other end-station devices, but that require high-touch handling by the network device (above and beyond normal, destination IP address-based forwarding) to forward the packet. Examples of high-touch handling include such functions as GRE encapsulation, QoS, MPLS VPNs, and SSL/IPsec encryption/decryption, etc. From the perspective of the network device, services plane packets may have a transit destination IP address, or may have a receive destination IP address (for example, in the case of a VPN tunnel endpoint).
Reference: https://tools.cisco.com/security/center/resources/copp_best_practices
Does this meet the goal?
Correct Answer:
A
- (Exam Topic 1)
Which is statement about IPv6 inspection is true?
Correct Answer:
D
- (Exam Topic 3)
Refer to the exhibit.
An administrator is configuring a GRE tunnel to establish an EIGRP neighbor to a remote router. The other tunnel endpoint is already configured. After applying the configuration as shown, the tunnel started flapping. Which action resolves the issue?
Correct Answer:
C
In this question we are advertising the tunnel IP address 192.168.12.2 to the other side. When other end receives the EIGRP advertisement, it realizes it can reach the other side of the tunnel via EIGRP. In other words, it reaches the tunnel destination through the tunnel itself -> This causes “recursive routing” error.
Note: In order to avoid this error, do not advertise the tunnel destination IP address on the tunnel interface to other side.
Good recursive routing reference: https://networklessons.com/cisco/ccie-routing-switching/gretunnel- recursive-routing-error
- (Exam Topic 1)
Refer to the exhibit.
Which subnet is redistributed from EIGRP to OSPF routing protocols?
Correct Answer:
A