Cisco Certified Support Technician (CCST) NetworkingNetworking FundamentalsMedium
A company is expanding its network and needs to assign unique identifiers to all network interfaces. They are considering an addressing scheme that uses 128-bit addresses to support a massive number of devices and address future growth without NAT. Which addressing scheme are they planning to implement?
- ADNS addressing
- BIPv4
- CIPv6
- DMAC addressing
Show answer & explanationAnswer & explanation
Correct answer: C. IPv6
IPv6 uses 128-bit addresses, providing an exponentially larger address space compared to IPv4's 32-bit addresses. This vast address space eliminates the need for Network Address Translation (NAT) in most scenarios, supporting a massive number of devices and future growth, which aligns with the scenario's requirements.
Why the other options are wrong
- A. DNS addressing translates domain names to IP addresses; it is not an addressing scheme for network interfaces itself.
- B. IPv4 uses 32-bit addresses, which are running out and often require NAT to conserve public addresses.
- D. MAC addresses are 48-bit hardware identifiers, not used for network routing or addressing future growth in this context.
IPv6 Addressing
IPv6 is the latest version of the Internet Protocol, designed to replace IPv4, primarily to provide a much larger address space and improve network efficiency and security.
- Uses 128-bit addresses, compared to IPv4's 32-bit addresses.
- Supports 3.4 x 10^38 unique addresses.
- Eliminates the need for Network Address Translation (NAT) in most cases.
Memory trick: Six is Super Sized, Solving Shortages.