Enclaves
What enclave is the unclassified network used by almost all USMC communications units for administrative work and unclassified email?
NIPR
If an administrator needs two isolated VRFs to exchange routes, what method makes this possible?
Configuring route leaking between the VRFs
What enclave is not an enclave in the usual sense of data classification, but it is the main secure transport VRF that every data enclave uses?
Black Core (BC)
A router interface connected directly to a commercial provider such as Starlink or AT&T would belong to which transport VRF?
INET
What command displays the routing table for a specific VRF named bc?
show ip route vrf bc
What enclave functions like NIPR but is authorized to carry information classified up to the Secret level?
SIPR
What VRF type provides the physical connections and basic IP routing needed for devices to reach each other?
Underlay VRF
How many VRFs can be assigned to a single interface?
1
What transport VRF carries data over the commercial internet while being treated as a trusted connection for reaching back to central military networks worldwide?
World Wide Reach Back (WWRB)
What happens to an interface's IP address when the interface is assigned to a VRF?
It is removed and must be configured again
What is the standard system for coalition interoperability with allied nations?
CENTRIXS
Virtual Routing and Forwarding (VRF) enables one physical router or multilayer switch to maintain what?
Many independent routing tables that act like virtual routers
By default, how does traffic in one VRF interact with traffic in another VRF?
It cannot interfere with or route to the other VRF unless an administrator configures it
How does the hsinet VRF differ from the inet VRF?
It has fewer virtual hops or better routing metrics so the router prefers its path
In a Front Door VRF (FVRF) design, where are the physical external interfaces placed?
In an underlay VRF, with secure tunnels connecting to an internal overlay VRF
Devices such as the KG-175D and KG-250X that protect SIPR traffic are best described as what?
Inline network encryptors providing Type 1 encryption
What VRF type links end devices using overlay protocols such as IPsec or GRE tunnels to carry different types of data?
Overlay VRF
How does FDMA separate users on a carrier wave?
By giving users continuous, dedicated frequency subchannels
In a TDMA satellite network, what mechanism organizes traffic from multiple users so it flows without collisions?
Each user transmits packets in assigned time slots on a shared frequency channel
What is the purpose of a Route Distinguisher (RD) when creating a VRF?
It uniquely identifies identical IP prefixes that might exist in different VRFs
What happens to Black Core tunnels if cryptographic negotiation and authentication fail?
The tunnels will not come up, blocking unauthorized access to the enclaves
Why is VRF technology especially valuable in tactical or mobile settings?
It allows one router to do the work of several routers, saving space, power, and weight
How does the hsinet VRF differ from the inet VRF?
It has fewer virtual hops or better routing metrics so the router prefers its path
What distinguishes FDMA from TDMA in how it allocates access to users?
FDMA divides available bandwidth into separate, continuously dedicated frequency bands per user
What command must be typed in order to ping the IP address 192.168.1.1 that is only in the BC routing table?
ping vrf BC 192.168.1.1