展示を参照してください。ネットワーク エンジニアは、10.100 ~ 2.248 ~ の範囲のホストからの Telnet トラフィックをブロックする必要があります。
10.100.2 255 をネットワーク 10.100.3.0 に接続し、それ以外はすべて許可します。エンジニアはどの構成を適用する必要がありますか?

正解:C
The task is to block Telnet traffic, which uses TCP port 23, from a specific range of IP addresses (10.100.2.248 to 10.100.2.255) to the network 10.100.3.0. The correct configuration must deny this specific traffic and permit all other traffic. Option C is the correct answer because it contains an access list that denies TCP traffic from the specified IP range to any destination on the 10.100.3.0 network using the 'eq telnet' keyword to specify the Telnet port. It also includes a statement to permit all other traffic, which fulfills the requirement to permit everything else. References: This answer is based on the knowledge of access control lists (ACLs) as covered in the Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) course material. Specifically, it refers to the standard and extended ACLs used to filter traffic based on IP addresses and port numbers.