Practice Free 300-410 Exam Online Questions
Refer to the exhibit.
The SNMP server with IP address 172.16 4 4 cannot access host router A.
Which configuration command on router A resolves the issue?
- A . snmp-server community ccnp
- B . access-list 4 permit 172.16.4.0 0.0.0.3
- C . access-list 4 permit host 172.16.4.4
- D . snmp-server host 172.16.4.4 ccnp
Refer to the exhibit.
The network administrator can see the DHCP discovery packet in R1. but R2 is not replying to the DHCP request. The R1 related interface is configured with the DHCP helper address. If the PC is directly connected to the Fa0/1 interface on R2, the DHCP server assigns as IP address from the DHCP pool to the PC.
Which two commands resolve this issue? (Choose two.)
- A . service dhcp-relay command on R1
- B . ip dhcp option 82 command on R2
- C . service dhcp command on R1
- D . ip dhcp relay information enable command on R1
- E . ip dhcp relay information trust-all command on R2
C,E
Explanation:
Refer to the exhibit.
The primary link between R1 and R2 went down but R3 is still advertising the 192.166.200.0/24 network to R1 and the 192.166.100.0/24 network to R2, which creates a loop.
Which action resolves the issue?
- A . Configure the eigrp stub command under the ElGRP process on R3
- B . Configure the summary address 192.168.0.0 255.255.0.0 100 command on R3
- C . Configure the eigrp stub leak-map command under the EIGRP process on R1
- D . Configure the eigrp stub command under the ElGRP process on R2
Refer to the exhibit.
When monitoring an IPv6 access list, an engineer notices that the ACL does not have any hits and is causing unnecessary traffic to pass through the interface.
Which command must be configured to resolve the issue?
- A . access-class INTERNET in
- B . ipv6 traffic-filter INTERNET in
- C . ipv6 access-class INTERNET in
- D . ip access-group INTERNET in
What are the two prerequisites to enable BFD on Cisco routers? (Choose two)
- A . A supported IP routing protocol must be configured on the participating routers.
- B . OSPF Demand Circuit must run BFD on all participating routers.
- C . ICMP must be allowed on all participating routers.
- D . UDP port 1985 must be allowed on all participating routers.
- E . Cisco Express Forwarding and IP Routing must be enabled on all participating routers.
Refer to the exhibit.
An engineer investigates an IPv6 EIGRP neighbor adjacency issue that sees the neighbors flapping and issued a ping from R1 to its directly connected neighbor. The link between the switches is stable at Layer 2. and other connected devices are also functioning.
Which action resolves the issue?
- A . The switch between the two neighbors is not IPv6 compatible and must be replaced with an IPv6 compatible device.
- B . Data is not reliably transmitted between the dynamically assigned link-local addresses of the routers and must be manually assigned.
- C . Multicast packets are not reliably transmitted over the link, and the switch must be replaced.
- D . The switch between the two neighbors is not configured for IPv6 multicast and must be configured for IPv6 multicast.
Which Layer 3 VPN attribute allows different customers to connect to the same MPLS network wrth overlapping IP ranges?
- A . VRF
- B . RT
- C . MP-BGP
- D . RD
D
Explanation:
In a Layer 3 VPN (Virtual Private Network) over an MPLS (Multiprotocol Label Switching) network, the attribute that allows different customers to connect with overlapping IP ranges is the Route Distinguisher (RD)123.
RD is a unique identifier that is prepended to each IP address in a customer’s VPN to create a unique VPNv4 address. This allows customers to use overlapping IP addresses without conflict123. The RD makes it possible for the same IP prefix to exist in different VPNs, which is crucial when customers have overlapping IP ranges123.
Reference: MPLS Layer 3 VPN Explained – NetworkLessons.com
MPLS: Layer 3 VPNs Configuration Guide – Cisco
Understanding Using MPLS-Based Layer 3 VPNs on Switches – Juniper
Refer to the exhibit.
An administrator can log in to the device using Telnet but the attempts to log in to the same device using SSH with the same credentials fail.
Which action resolves this issue?
- A . Configure SSH service on the router
- B . Configure transport input all on the VTY lines to allow SSH
- C . Configure to use the Telnet user database for SSH as well
- D . Configure the VTY lines with login local
Which list defines the contents of an MPLS label?
- A . 20-bit label; 3-bit traffic class; 1-bit bottom stack; 8-bit TTL
- B . 32-bit label; 3-bit traffic class; 1-bit bottom stack; 8-bit TTL
- C . 20-bit label; 3-bit flow label; 1-bit bottom stack; 8-bit hop limit
- D . 32-bit label; 3-bit flow label; 1-bit bottom stack; 8-bit hop limit
A
Explanation:
The first 20 bits constitute a label, which can have 2^20 values. Next comes 3 bit value called Traffic Class. It was formerly called as experimental (EXP) field. Now it has been renamed to Traffic Class (TC). This field is used for QoS related functions. Ingress router can classify the packet according to some criterion and assign a 3 bit value to this filed. If an incoming packet is marked with some IP Precedence or DSCP value and the ingress router may use such a field to assign an FEC to the packet. Next bit is Stack bit which is called bottom-of-stack bit. This field is used when more than one label is assigned to a packet, as in the case of MPLS VPNs or MPLS TE. Next byte is MPLS TTL field which serves the same purpose as that of IP TTL byte in the IP header
Reference: https://tools.ietf.org/html/rfc5462
Which MPLS value is combined with the IP prefix to convert to a VPNv4 prefix?
- A . 16-byte Route Distinguisher
- B . 8-byte Route Target
- C . 16-byte Route Target
- D . 8-byte Route Distinguisher