[单项选择]Which statement about firefighting foam is TRUE?（）
A. Foam conducts electricity
B. To be most effective，foam should be directed at the base of the fire
C. Foam is most effective on burning liquids which are flowing
D. Foam can ONLY be used to extinguish class A fires

[多项选择]Which statements are true about EIGRP successor routes (Choose two.)（）。
A. A successor route is used by EIGRP to forward traffic to a destination.
B. Successor routes are saved in the topology table to be used if the primary route fails.
C. Successor routes are flagged as "active" in the routing table.
D. A successor route may be backed up by a feasible successor route.
E. Successor routes are stored in the neighbor table following the discovery process.

[单项选择]Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet（）。
A. Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link.
B. Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal.
C. Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth.
D. Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive.

[单项选择]Which statement is TRUE about placing the eyes of two mooring lines on the same bollard?（）
A. Put one line at the low point and one at the high point of the bollard so they don't touch
B. Take the eye of the second line up through the eye of the first line before putting the second line on the bollard
C. Never put two mooring lines on the same bollard
D. The mooring line forward should be put on the bollard first

[单项选择]Which statement is TRUE about nylon line?（）
A. Manila line will usually last longer than nylon line
B. Nylon line is excellent for use in alongside towing
C. A normal safe working load will stretch nylon line 50%
D. Nylon stoppers should be used with nylon line

[单项选择]Which statement about RIPng is true?（）
A. RIPng allows for routes with up to 30 hops.
B. RIPng is enabled on each interface separately.
C. RIPng uses broadcasts to exchange routes.
D. There can be only one RIPng process per router.

[单项选择]Which statement about satellite navigation is TRUE? （）
A. While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracy
B. The satellites are in equatorial orbits around the earth about 60°of longitude apart
C. The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satellite
D. The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking

[多项选择]Which three statements are true about EIGRP route summarization?（）
A. When manual summarization is configured, the router immediately creates a route that points to null0 interface
B. Manual route summarization  is configured in router configuration mode when the router is configured for EIGRP routing
C. Manual route summarization is configured on the interface
D. The ip summary - address eigrp command generates a default route with an administrative distance  of 5
E. When manual summarization is configured, the summary route will use the metric of the largest specific metric of the summary routes
F. The ip summary - address eigrp command generates a default route with an administrative distance of 90

[多项选择]Which three statements are true about EIGRP operation?（）
A. When summarization is configured, the router will also create a route to null 0.
B. The summary route remains in the route table, even if there are no more specific routes to the network.
C. Summarization is configured on a per- interface level.
D. The maximum metric for the specific routes is used as the metric for the summary route.
E. Automatic summarization across major network boundaries  is enabled by default.

[单项选择]Which statement about the Navigation Rules is TRUE?（）.
A. The rules require vessels to comply with Traffic Separation Scheme regulations
B. The rules use the term safe speed
C. The Rules permit a stand-on vessel to take action prior to being in extremis
D. All of the above are correct

[多项选择]Which three statements about RSTP are true?（）
A. RSTP significantly reduces topology reconverging time after a link failure.
B. RSTP expends the STP port roles by adding the alternate and backup roles.
C. RSTP port atates are blocking,discarding,learing,or forwarding.
D. RSTP also uses the STP proprsal-agreement sequence.
E. RSTP use the same timer-baseed process as STP on point-to-point links.
F. RSTP provides a faster transition to the forwarding state on point-to-point links than STP does.

[多项选择]Which three statements about EIGRP are true?（）
A. EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.
B. EIGRP uses a hello protocol to establish neighbor relationships
C. EIGRP uses split horizon and reverse poisoning to avoid routing loops.
D. EIGRP uses periodic updates to exchange routing information
E. EIGRP allows routers of different manufacturers to interoperate
F. EIGRP supports VLSM and authentication for routing updates.
G. EIGRP use a broadcast address to send routing information.

[单项选择]Which statement about IPv6 is true?（）
A. Addresses are not hierarchical and are assigned at random.
B. Only one IPv6 address can exist on a given interface.
C. There are 2.7 billion addresses available.
D. Broadcasts have been eliminated and replaced with multicasts.