You are tasked with implementing a 1000-phone remote access solution, where phones will traverse a WAN edge router.
Assuming all of the following features are supported in a hardware- assisted manner, which of the following will have the most detrimental impact on the delay of the packet?
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A. B. C. D.A.
To determine which of the listed features (encryption, stateful firewall, MPLS encapsulation, or GRE encapsulation) will have the most detrimental impact on packet delay for a 1000-phone remote access solution traversing a WAN edge router, we need to understand the characteristics of each feature.
Encryption: Encryption is the process of transforming data so that it cannot be understood without the decryption key. Encryption can be performed using different algorithms, such as AES, DES, or RSA. The encryption process adds overhead to the packet, which can increase the packet delay. The amount of delay added depends on the processing power of the encryption device and the key length used.
Stateful Firewall: A stateful firewall inspects and tracks the state of network connections. It maintains information about the connection and uses that information to enforce security policies. A stateful firewall can add some overhead to the packet processing, but it is usually minimal, and the impact on delay is negligible.
MPLS Encapsulation: MPLS (Multiprotocol Label Switching) is a technique for forwarding packets based on labels instead of the IP address. MPLS adds a label to the packet header, which identifies the path through the MPLS network. MPLS encapsulation adds overhead to the packet, which can increase the packet delay. The amount of delay added depends on the label stack depth and the processing power of the MPLS devices.
GRE Encapsulation: GRE (Generic Routing Encapsulation) is a tunneling protocol used to encapsulate packets and send them over a network. GRE encapsulation adds a new IP header to the packet, which can increase the packet delay. The amount of delay added depends on the processing power of the GRE devices and the size of the packet.
Based on the above analysis, we can conclude that the feature that will have the most detrimental impact on the delay of the packet is encryption. Encryption adds overhead to the packet, which can significantly increase the packet delay. The impact of the other features (stateful firewall, MPLS encapsulation, and GRE encapsulation) on packet delay is minimal compared to encryption. Therefore, if all of the listed features are supported in a hardware-assisted manner, encryption will have the most detrimental impact on packet delay.