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| Section | Objectives |
|---|---|
| Topic 1: Operations and Troubleshooting | - Troubleshooting routing and switching issues - Junos CLI monitoring tools |
| Topic 2: High Availability | - Redundancy concepts in enterprise networks - VRRP configuration and behavior |
| Topic 3: Network Services | - NAT concepts in Junos - Basic multicast concepts |
| Topic 4: Layer 2 Switching Technologies | - Spanning Tree Protocol (STP/RSTP/MSTP) - VLANs and trunking - Ethernet switching concepts |
| Topic 5: Routing Protocols | - BGP fundamentals and policy control - OSPF configuration and troubleshooting - IS-IS overview |
| Topic 6: Routing Policy and Filtering | - Policy statements - Route filtering and preference control |
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NEW QUESTION # 186
A new network requires multiple topology support. You decide to use IS-IS in this situation. Which three protocol topologies are supported in this scenario? (Choose three.)
Answer: B,C,D
Explanation:
IS-IS (Intermediate System to Intermediate System) is a routing protocol that is designed to move information efficiently within a computer network. It supports multiple protocol topologies, including IPv4, IPv6, and multicast.
NEW QUESTION # 187
Referring to the exhibit, which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?
Answer: A
NEW QUESTION # 188
You are verifying a new BGP peering session with an ISP. You issue the show bgp summary command, but the output shows the peer in the Active state.
Which statement is correct in this scenario?
Answer: D
Explanation:
The BGP finite state machine defined in RFC 4271 progresses through Idle, Connect, Active, OpenSent, OpenConfirm, and finally Established. The Active state is entered either directly after Idle, when the local router begins retrying a TCP connection setup toward the configured peer, or after a previous Connect attempt has failed and the ConnectRetry timer has expired, prompting the router to keep trying to complete the underlying TCP three-way handshake. Seeing a peer parked in Active therefore means the local device has a fully valid neighbor configuration and is persistently attempting to reach the remote address on TCP port 179, but the handshake is not succeeding - common root causes include a firewall or ACL blocking TCP 179 between the two endpoints, an unreachable or incorrect peer IP address, the remote BGP process not running or not listening, or an asymmetric routing path preventing the SYN/ACK from returning. It does not indicate a misconfiguration on the local box in the sense of a missing statement (that would typically leave the session as Idle), nor does it indicate an established, functioning session exchanging UPDATE messages (that state is Established), and it is not a deliberately idle/disabled condition, which Junos reports plainly as Idle.
Recognizing Active as 'trying to connect' rather than 'connected' is essential for correct BGP troubleshooting sequencing. Reference topics: Junos Enterprise Routing - BGP Fundamentals, BGP Finite State Machine and Session Verification.
NEW QUESTION # 189
You are attempting to set up VRRP with R1 and R2 being participating members. You want R1 to be the master router and R2 to be the backup router with the virtual router they create being at address 172.25.100.1. The virtual router is not pinging from either User A or User B. Referring to the exhibit, what must be done to correct the problem?
Answer: A
NEW QUESTION # 190
You want to ensure traffic is routed through a GRE tunnel. In this scenario, which two statements will satisfy this requirement? (Choose two.)
Answer: A,C
Explanation:
Option A is correct. For traffic to be sent through a GRE tunnel, there must be a route that directs the traffic into the tunnel. This is typically accomplished through the use of a static route or a dynamic routing protocol.
Option B is correct. All intermediary devices must have a route to the tunnel endpoints. In real- world scenarios, the tunnel endpoints for a tunnel going over the Internet must have globally reachable internet addresses. Otherwise, intermediate routers in the Internet cannot forward the tunneled packets.
NEW QUESTION # 191
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