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| Section | Objectives |
|---|---|
| IS-IS | - Link-state database and PDUs - Adjacencies and troubleshooting - Levels, areas and metrics |
| High Availability | - Link Aggregation Groups and RTG - VRRP, NSR, NSB and BFD - Virtual chassis and graceful restart |
| Protocol-Independent Routing | - Load balancing and filter-based forwarding - Martian addresses and RIB groups - Static, aggregate, generated routes |
| Layer 2 Security | - Port security (MAC limiting, DHCP snooping, DAI, IP source guard) - MACsec and storm control - Layer 2 firewall filters - BPDU, loop and root protection |
| OSPF | - Link-state database and packet types - Areas and LSA types - Router ID, adjacencies and neighbors |
| BGP | - Attributes and path selection - EBGP and IBGP peer interactions - BGP basic operations and message types |
| Spanning Tree | - Bridge Protocol Data Units (BPDUs) - Convergence and reconvergence - STP and RSTP concepts, roles and states |
| Layer 2 Switching and VLANs | - Frame processing - Native VLANs and voice VLANs - Inter-VLAN routing - Bridging components - Ports and VLAN tagging |
| Tunnels | - GRE and IP-IP configuration and troubleshooting - IP tunneling concepts |
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NEW QUESTION # 59
You are deploying an EX Series switch with a Wi-Fi access point. The access point needs all untagged traffic to use a specific VLAN. In this scenario, which feature should you enable on the switch port?
Answer: A
NEW QUESTION # 60
Which three statements are correct about OSPF packet types? (Choose three.)
Answer: A,C,E
NEW QUESTION # 61
What is a purpose of using a spanning tree protocol?
Answer: A
Explanation:
A broadcast storm is a network condition where a large number of broadcast packets are sent and received by multiple devices, causing congestion and performance degradation. A broadcast storm can occur when there are loops in the network topology, meaning that there are multiple paths between two devices.
A spanning tree protocol is a network protocol that prevents loops from being formed when switches or bridges are interconnected via multiple paths. It does this by creating a logical tree structure that spans all the devices in the network, and disabling or blocking the links that are not part of the tree, leaving a single active path between any two devices.
By eliminating loops, a spanning tree protocol also eliminates broadcast storms, as broadcast packets will not be forwarded endlessly along the looped paths. Instead, broadcast packets will be sent only along the tree structure, reaching each device once and avoiding congestion.
NEW QUESTION # 62 
Click the Exhibit button.
Referring to the exhibit, all possible firewall filters are configured along the path from Server A to Server B.
In which order will Switch 1 process transmit (Tx) and receive (Rx) firewall filters?
Answer: A
Explanation:
Because Server A resides in VLAN 10 and Server B resides in VLAN 20, traffic between them cannot remain a purely Layer 2 switched flow; it must be routed between the two VLANs, which on Switch 1 means the packet traverses the switch's internal routing engine (via an IRB interface) between the ingress and egress switching stages. Junos processes firewall filters along this path in a strict, layered order that mirrors the packet's actual journey through the device. First, any filter applied at the physical ingress port level (Rx-Port) is evaluated as the frame first arrives on ge-0/0/10. Next, any filter applied to the ingress VLAN (Rx-VLAN, i.
e., VLAN 10) is evaluated as the frame is classified into its source broadcast domain. Because the destination subnet requires routing, the packet is then handed to the routing engine, where any input/ingress routed filter (Rx-Router) applied to the receiving IRB interface is evaluated next, followed by any output/egress routed filter (Tx-Router) applied as the now-routed packet is handed from the routing engine back out toward VLAN
20. Finally, the packet passes through any egress VLAN filter (Tx-VLAN, for VLAN 20) and then the egress physical port filter (Tx-Port) on ge-0/0/20 immediately before transmission to Server B. This complete six- stage sequence - Rx-Port, Rx-VLAN, Rx-Router, Tx-Router, Tx-VLAN, Tx-Port - reflects every filter- evaluation checkpoint a routed, inter-VLAN packet passes through on an EX Series Layer 3 switch.
Reference topics: Junos Enterprise Switching - Layer 2 Switching and Firewall Filter Processing Order for Routed VLAN Traffic.
NEW QUESTION # 63
Which two statements are correct about generated routes? (Choose two.)
Answer: A,D
Explanation:
A is correct because generated routes require a contributing route. A contributing route is a route that matches the destination prefix of the generated route and has a valid next hop. A generated route is only installed in the routing table if there is at least one contributing route available. This ensures that the generated route is reachable and useful. If there is no contributing route, the generated route is not added to the routing table.
B is correct because generated routes show a next hop in the routing table. A generated route inherits the next hop of its primary contributing route, which is the most preferred route among all the contributing routes. The next hop of the generated route can be either an IP address or an interface name, depending on the type of the contributing route. The next hop of the generated route can also be modified by a routing policy.
NEW QUESTION # 64
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