Private IPv4 Addressing and RFC 1918
24 questions
A network administrator is assigning an IPv4 address to an enterprise border router interface connected directly to an Internet Service Provider (ISP) WAN link. The interface must communicate on the public Internet without employing Network Address Translation (NAT). Which of the following IPv4 addresses is globally routable over the Internet according to RFC 1918 specifications?
A network administrator is auditing enterprise IP addressing schemas across multiple branch office subnets to ensure full compliance with RFC 1918 private addressing standards. During the audit, the administrator observes four host interface configurations:
- Device A:
- Device B:
- Device C:
- Device D:
Which host is configured with a globally routable public IPv4 address rather than a valid RFC 1918 private IPv4 address?
A network architect is establishing standard address allocations and boundary checks for an enterprise network redesign. Match each IPv4 address block or prefix range on the left with its corresponding RFC 1918 classification, CIDR specifications, or Internet routing characteristics on the right.
Click a left item, then click its matching right item
Items
Matches
A network engineer is configuring interface IP addresses on a core layer switch for an internal corporate segment. Company policy strictly dictates that all internal devices must use RFC 1918 private IPv4 addresses and that addresses must be usable host assignments. Which of the following IP address and subnet mask combinations represents a valid, usable host address located strictly within the upper boundary limit of the RFC 1918 Class B private address space?
An enterprise network engineer is auditing the IPv4 addressing scheme across several newly acquired branch office routers. Corporate security policy strictly mandates that all internal host interfaces must be configured within RFC 1918 private IPv4 address space to prevent internal routing leakage over the public Internet. During the audit, the engineer inspects four interface IP configurations. Which of the following IPv4 address and subnet mask assignments represents a public IPv4 host address that violates RFC 1918 guidelines?
A network technician is configuring an isolated staging environment and must assign a dedicated IPv4 subnet using unroutable addresses specified in RFC 1918. Which of the following network prefixes represents a valid private IPv4 address block according to RFC 1918?
A network security analyst is auditing border firewall traffic logs to ensure no unroutable internal addresses are leaked to the public Internet. Corporate security policy requires Network Address Translation (NAT) for all internal devices accessing public web services.
Which TWO IPv4 addresses identified in the firewall log belong to the RFC 1918 private address space and require source NAT before being routed across the public Internet? (Select two.)
Select all that apply
A network administrator is documenting the RFC 1918 private IPv4 address space allocation for an enterprise network redesign. Match each RFC 1918 address block on the left with its corresponding CIDR prefix length and block composition description on the right.
Click a left item, then click its matching right item
Items
Matches
A network administrator is configuring an internal host interface and must assign an IP address within the RFC 1918 Class B private address space. Which of the following IP addresses is a valid RFC 1918 private IPv4 address?
A network engineer is configuring internal host interfaces on a private enterprise network. According to RFC 1918, which of the following IP addresses falls within a reserved private IPv4 address block and can be assigned to internal network devices without public Internet routing?
A network engineer is conducting an IP addressing audit for an enterprise network. The organization requires all internal hosts to utilize private IPv4 addresses specified in RFC 1918 to ensure proper isolated routing and avoid packet delivery issues across the public Internet. Which IPv4 address assignment contains a globally routable public IPv4 address rather than a valid RFC 1918 private address?
Match each RFC 1918 private IPv4 address range to its defined default CIDR block and maximum number of usable host addresses.
Click a left item, then click its matching right item
Items
Matches
Match each RFC 1918 private IPv4 address block to its designated default CIDR prefix length.
Click a left item, then click its matching right item
Items
Matches
A network security architect is auditing perimeter firewalls and IP addressing schemes across a enterprise topology. Match each IPv4 address specification to its corresponding RFC 1918 compliance status and public Internet routing behavior.
Click a left item, then click its matching right item
Items
Matches
During a security compliance audit of internal corporate subnets, a network engineer is asked to verify that host interfaces use IPv4 addresses from the Class B private space defined in RFC 1918. Which of the following IPv4 addresses falls strictly within the valid RFC 1918 Class B private address range?
An administrator is configuring an internal workstation and needs to manually assign an IPv4 address that belongs to an RFC 1918 private network block. Which IPv4 address is valid for this requirement?
An edge security gateway is configured to drop any outgoing packet to the public Internet if its source IP address belongs to an RFC 1918 private address space. During a security audit of un-translated egress traffic logs, four source IPv4 addresses were recorded. Which source IPv4 address is globally routable on the public Internet and will be permitted through the firewall filter?
A network engineer is auditing perimeter firewall logs on an enterprise WAN edge router. The firewall security policy is configured to drop any outbound packet whose source IP address falls within the RFC 1918 private IPv4 address space unless it has undergone Network Address Translation (NAT). During a routine inspection, the log records outbound packets from four host IP addresses: 11.10.5.1, 172.28.140.22, 172.33.10.1, and 192.169.50.4. Which source IP address will be dropped by the firewall policy for utilizing an RFC 1918 private IPv4 address?
A network manager is reviewing host IP allocation requests for internal database servers. To ensure non-routable communication over the public Internet according to RFC 1918 standards, the network team must identify valid private host IPv4 addresses. Which of the following IPv4 addresses belong to the RFC 1918 private address space and can be assigned to internal hosts? (Select TWO.)
Select all that apply
A network administrator is allocating IPv4 addresses for internal workstations on an enterprise LAN. Which of the following IPv4 addresses are reserved for private network use under RFC 1918? (Select TWO.)
Select all that apply