You want to ensure that your RSVP LSPs are following a particular path across the network.
Which RSVP object ensures that your desire will be met?
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A. B. C. D.A
The correct answer is A. Explicit Route Object.
Resource Reservation Protocol (RSVP) is a protocol used for establishing Quality of Service (QoS) paths across an IP network. RSVP uses several objects to signal and establish a path through the network. One of these objects is the Explicit Route Object (ERO), which is used to define a specific path that a traffic flow should take through the network.
When an RSVP path message is sent, it includes one or more EROs that define the path that the traffic should follow. Each ERO contains a list of IP addresses, with each address representing a specific hop on the path. RSVP-capable routers along the path examine the EROs to determine whether they are capable of handling the traffic and whether the path is valid.
The ERO object can be either strict or loose. A strict ERO requires that each router along the path is specified explicitly. A loose ERO allows for flexibility in the path and allows RSVP-capable routers to choose an appropriate path based on the network conditions.
In the context of the question, the Explicit Route Object (ERO) ensures that the RSVP LSPs (Label Switched Paths) follow a specific path across the network. By including an ERO in the RSVP path message, the path can be explicitly defined, and the RSVP-capable routers will use that path for the LSP.
The other options mentioned in the question are as follows:
B. Record Route Object - A Record Route Object (RRO) is used to record the path that a packet takes through the network. It is not used to specify a particular path for an RSVP LSP.
C. Session Object - The Session Object is used to identify the traffic flow for which an RSVP LSP is being established. It is not used to specify a particular path for the LSP.
D. Traffic Specification Object - The Traffic Specification Object (TSPEC) is used to specify the bandwidth, delay, and other QoS parameters for the traffic flow. It is not used to specify a particular path for the LSP.