Cisco 200-301 Bundle

A /16 covers numerous unrelated subnets and is not an appropriate narrow host route. It could change traffic to many destinations outside the maintenance target.

A /24 route would cover every host in the subnet, unintentionally redirecting much more traffic than the one management workstation. The case specifically requires a host-only exception.

The default route is the broadest possible fallback and cannot express a single-host exception. It would alter other unmatched destinations if preferred.

Cisco IPv4 static routing uses a destination network and dotted subnet mask. The problem is the wrong mask length, not the use of a mask.

A /24 is a shorter prefix and covers 256 addresses, while a /26 covers 64. The configured mask would over-broaden the affected destinations.

An IPv4 static route may legally specify a reachable next-hop IP. A VLAN ID cannot replace that routing adjacency.

The IPv4 static route command expects a dotted-decimal subnet mask, not the ACL wildcard complement. For /27 the proper subnet mask is 255.255.255.224.

The IPv6 route command handles IPv6 colon-form destination prefixes, not the dotted-decimal IPv4 network shown. Use the appropriate IPv4 static syntax.

A /24 mask is broader than the intended /27, so it could redirect addresses outside the specified remote branch subnet. Keep the exact destination prefix.

This interface-only form is reasonable on true point-to-point interfaces but may trigger ARP for each destination over a multi-access Ethernet. It does not meet the explicit operational constraint.

The /24 mask extends beyond the intended /26 network. Even with a valid next hop, that would redirect extra destinations.

VLAN membership configures Ethernet segmentation and does not install the requested remote IPv4 prefix. Layer 3 forwarding still needs a proper route.

A route-table clear affects operational entries and does not substitute for removing the static command from running configuration. The undesired route could return.

Disabling IP routing removes transit forwarding more broadly than the single mistaken route. It would disrupt unrelated networks.

Interface shutdown may withdraw operational routes but also stops legitimate traffic. The incorrect static configuration would still remain saved.

IPv4 routing and IPv6 unicast routing are distinct forwarding capabilities on many Cisco platforms. The presence of an IPv4 route does not prove IPv6 transit is enabled.

PortFast is an STP edge-switching feature rather than the IPv6 router forwarding command. A routed SVI needs IPv6 unicast routing, not faster spanning-tree transition.

AAAA records resolve names to IPv6 addresses but do not create inter-VLAN next-hop forwarding. Packets still require a router with IPv6 unicast routing enabled.

EtherChannel aggregates local Ethernet links and is unrelated to route-source failover across independent ISP next hops. A static route must still be configured for the alternate path.

Changing the prefix alters which destinations match the route and is not the standard equal-prefix administrative-distance backup mechanism. It can cause unexpected forwarding instead of clean failover.

Lower administrative distance indicates stronger preference; that would make the supposed backup primary. Floating requires weaker preference while the primary exists.

A smaller administrative distance gives the static even stronger preference. It worsens the condition that is suppressing OSPF.

A router ID identifies an OSPF process and may not be a reachable forwarding neighbor. Route preference is controlled here by the static administrative distance.

Metric changes do not make an AD-one static route less preferred than same-prefix OSPF. They affect OSPF path cost selection instead.

A /24 route would change forwarding for all 256 addresses in 198.51.100.0/24, not just 198.51.100.50. It is broader than the host-only requirement.

The destination 198.51.100.50 is not the canonical network ID of its /24 and this mask still describes a network route. A /32 is the clear exact-host match.

A 0.0.0.0 mask represents the IPv4 default route rather than a host route. It could affect unrelated destinations that lack a more-specific entry.

A /0 matches the entire IPv6 address space and is the least-specific possible route. It cannot express the requested individual management endpoint.

/64 is common for SLAAC-connected LANs but covers many interface identifiers. A static route may legally specify /128 to select one destination host.

IPv6 addresses are 128 bits long. A /32 IPv6 prefix aggregates a much larger address block and does not identify the requested single endpoint.

That broad entry would overlap the existing route for all 256 addresses and does not isolate the one named server. The requirement is host-specific.

A host value is not an aligned /24 network ID, and a /24-sized exception would affect more addresses than intended. Use a /32.

DNS aliases change application name resolution but not the router’s installed IP route for an exact destination address. A host route is needed.