ShopDeck Interview Questions and Answers

ACLs are used to control traffic flow by filtering packets based on defined criteria. They can be implemented on line vty to secure management traffic.

• ACLs can be created to permit or deny traffic based on source/destination IP address, port numbers, or protocols

• To secure management traffic on line vty, an ACL can be applied to restrict access to specific IP addresses or ranges

• For example, to allow only a specific IP address to access the management interface, an ACL can be c...read more

TTL value in MPLS determines the maximum number of hops a packet can take before being discarded.

• TTL value is decremented by 1 at each hop in the MPLS network

• If TTL reaches 0, the packet is discarded

• TTL prevents packets from circulating indefinitely in case of routing loops

• TTL value can be set by the sender and modified by routers along the path

The two components of a VPNv4 address are the VPN route distinguisher and the IPv4 address.

• VPN route distinguisher is used to uniquely identify VPN routes within a provider network

• IPv4 address is the actual IP address used for routing within the VPN

• Example: RD:100:1 and IPv4 address: 192.168.1.1

Traceroute is a network diagnostic tool used to track the path packets take from one networked device to another.

• Traceroute sends packets with increasing TTL values to elicit ICMP Time Exceeded responses from each router along the path.

• The IP addresses of the routers and round-trip times are displayed to show the route taken by the packets.

• Traceroute helps identify network issues such as packet loss, latency, and routing loops.

• It is commonly used to troubleshoot network conne...read more

VPC is a virtual private cloud that allows you to create a private network in the cloud. Traffic can flow from VPC to non-VPC environment via VPN or Direct Connect.

• VPC allows you to create a private network in the cloud

• VPC can be connected to on-premises data centers via VPN or Direct Connect

• Traffic can flow from VPC to non-VPC environment via VPN or Direct Connect