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【单选题】

What protection method is used in 4F BLSR networks?（）

A、Each fiber has half of its SONET capacity reserved for protection.

B、Two fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.

C、The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.

D、The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.

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更多“What protection method is used in 4F BLSR networks?（）”相关的问题

第1题

[单选题] Given the configuration shown in the exhibit, what is the function of the protect-loopback filter?（）

A、to protect the Routing Engine B、to protect all interfaces on the device C、to protect the Packet Forwarding Engine D、to protect the management interface

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第2题

[单选题] Given the configuration shown in the exhibit, what is the function of the protect-loopback filter?（）

A、to protect the Routing Engine B、to protect all interfaces on the device C、to protect the Packet Forwarding Engine D、to protect the management interface

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第3题

[单选题] What is a consequence of installing a Cisco End-to-End Solution?（）

A、Different Support Contracts with multiple vendors B、Difficulty implementing network services C、Solid investment protection D、Poor Investment Protection

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第4题

[单选题] What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）

A、The standby database is protected against write operations. B、The primary database is protected against write operations. C、The primary database is protected against data loss and data divergence. D、The standby database is protected against data loss and data divergence.

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第5题

[单选题] A customer has 2 DS1s to add between adjacent nodes in a UPSR ring. What type of circuit should you recommend?（）

A、VT circuits B、STS circuits C、VT tunnel circuits D、1:1 protection circuits E、1:N protection circuits

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第6题

[] What are three applications for firewall filters in JUNOS software？（）

A、A.route filtering B、B.protect the routing engine C、C.securing the router control plane D、D.protect against hidden bridge loops E、E.protect against denial of service attacks

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第7题

[多选题] What are two characteristics of dual-ring interconnect in SONET networks? （）(Choose two.)

A、It protects signals against node failures between rings. B、It protects signals against node failure within a single ring. C、It allows for traffic to be preempted when a ring switch occurs. D、Traffic can be dropped and continued at interconnecting nodes. E、It protects preemptible traffic from being dropped when a ring switch occurs.

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第8题

[单选题] What is the purpose of Dual Ring Interconnect with D C for SDH rings？（）

A、Protects signals when a ring switch fails B、Protects signals when multiple span switches fail C、Protects pre-emptible traffic from being dropped when a ring switch occurs D、Protects signals against any combination of link failure in each ring

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第9题

[单选题] What are the most important reasons for using water fog to fight fires?（）

A、Smothers burning surfaces，organically destroys fuel B、Cools fire and adjacent surfaces，provides protective barrier C、Reaches areas not protected by steam or CO₂ smothering systems D、Allows fire to be attacked from leeward，saturates liquid surfaces

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第10题

[单选题] What Cisco technology protects against Spanning-Tree Protocol manipulation？（）

A、 Spanning tree protect B、 Root Guard and BPDU Guard C、 Unicast Reverse Path Forwarding D、 MAC spoof guard E、 Port Security

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