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Exam Code: JN0-649

Certification: JNCIP-ENT (Juniper Networks Certified Professional Enterprise Routing and Switching)

Format: 65 multiple-choice questions

Duration: 120 minutes

Passing Score: Approximately 65–70% (subject to change)

Delivery: Pearson VUE testing centers or online proctored

Validity: Certification is valid for three years

- Interior Gateway Protocols (IGPs)

- OSPF (Open Shortest Path First):

- Link-state database (LSDB) and flooding mechanisms

- OSPF packet types: Hello, Database Description (DBD), Link-State Request (LSR), Link-State Update (LSU), Link-State Acknowledgment (LSAck)

- LSA types (e.g., Router, Network, Summary, External, NSSA External)

- Area types: Backbone (Area 0), Stub, Totally Stubby, Not-So-Stubby Area (NSSA)

- OSPF authentication (plain text, MD5)

- Virtual links and route summarization

- OSPF troubleshooting (e.g., neighbor adjacency issues, route filtering)

- IS-IS (Intermediate System to Intermediate System):

- IS-IS levels (Level 1, Level 2, Level 1-2)

- TLVs (Type-Length-Value) and PDU types (Hello, LSP, CSNP, PSNP)

- Designated Intermediate System (DIS) election

- Wide metrics vs. narrow metrics

- IS-IS authentication and route leaking

- Troubleshooting IS-IS adjacency and routing issues

- LSDB, LSA, SPF (Shortest Path First), DR/BDR (Designated Router/Backup Designated Router), ABR (Area Border Router), ASBR (Autonomous System Boundary Router), NET (Network Entity Title), CLNS (Connectionless Network Service), route redistribution.

- Border Gateway Protocol (BGP)

- Description: Configuring and troubleshooting BGP in enterprise environments, focusing on both internal (iBGP) and external (eBGP) peering.

- BGP attributes: AS Path, Next Hop, Local Preference, MED (Multi-Exit Discriminator), Origin, Community

- BGP message types: Open, Update, Notification, Keepalive

- iBGP vs. eBGP peering rules and route reflection

- Confederations and route reflectors for scalability

- BGP path selection process

- Route filtering using prefix lists, route maps, and communities

- BGP multipath and load balancing

- Troubleshooting BGP (e.g., peering issues, missing routes, attribute manipulation)

- Autonomous System (AS), BGP neighbor states (Idle, Connect, Active, OpenSent, OpenConfirm, Established), route reflector, confederation, flap damping, BGP next-hop resolution, graceful restart.

- IP Multicast

- Multicast addressing (IPv4: 224.0.0.0/4, IPv6: FF00::/8)

- IGMP (Internet Group Management Protocol) versions (v1, v2, v3)

- PIM (Protocol Independent Multicast) modes: Dense Mode, Sparse Mode, Source-Specific Multicast (SSM)

- Rendezvous Point (RP) configuration: Static, Auto-RP, Bootstrap Router (BSR)

- Any-Source Multicast (ASM) vs. Source-Specific Multicast (SSM)

- Multicast distribution trees: Shared Tree (*,G), Source Tree (S,G)

- Troubleshooting multicast (e.g., RPF (Reverse Path Forwarding) failures, group membership issues)

- Multicast group, IGMP snooping, PIM register messages, RPF check, mroute table, shortest-path tree, shared tree, DR (Designated Router) for multicast.

- Ethernet Switching and Virtual LANs (VLANs)

- Description: Configuring and troubleshooting advanced Ethernet switching features on Juniper EX and QFX series switches.

- VLAN configuration and tagging (IEEE 802.1Q)

- Access vs. trunk ports

- Private VLANs (PVLANs): Isolated, Community, Promiscuous ports

- Virtual Chassis and Virtual Chassis Fabric (VCF)

- Data Center Interconnect (DCI) using EVPN (Ethernet VPN)

- Spanning Tree Protocols: STP, RSTP, MSTP, VSTP

- Link Aggregation Groups (LAG) and MC-LAG (Multi-Chassis LAG)

- Troubleshooting switching issues (e.g., VLAN misconfiguration, loop prevention)

- VLAN ID, tagged/untagged frames, Q-in-Q tunneling, BPDU (Bridge Protocol Data Unit), root bridge, LACP (Link Aggregation Control Protocol), MAC learning, flooding, EVPN-VXLAN.

- Layer 2 Authentication and Access Control

- Description: Implementing security features for Layer 2 networks.

- 802.1X authentication (port-based network access control)

- MAC RADIUS authentication

- Captive portal for guest access

- Dynamic VLAN assignment

- Storm control and rate limiting

- DHCP snooping and ARP inspection

- Troubleshooting authentication and access control issues

- Supplicant, authenticator, authentication server, EAP (Extensible Authentication Protocol), RADIUS, port security, DAI (Dynamic ARP Inspection), IP source guard.

- Protocol-Independent Routing

- Description: Configuring and troubleshooting routing features that are independent of specific routing protocols.

- Static routes and aggregate routes

- Route preference and administrative distance

- Filter-based forwarding (FBF)

- Routing instances (virtual routers, VRFs)

- Load balancing and ECMP (Equal-Cost Multipath)

- Troubleshooting routing table issues

- Next-hop types (direct, indirect, reject, discard), qualified next-hop, routing policy, VRF (Virtual Routing and Forwarding), ECMP hashing, route resolution.

- High Availability (HA)

- Description: Implementing and troubleshooting high-availability features for enterprise networks.

- Graceful Routing Engine Switchover (GRES)

- Non-Stop Active Routing (NSR)

- Non-Stop Bridging (NSB)

- Virtual Router Redundancy Protocol (VRRP)

- Bidirectional Forwarding Detection (BFD)

- Link Aggregation Control Protocol (LACP) for redundancy

- Troubleshooting HA configurations

- Primary/backup Routing Engine, VRRP priority, preemption, BFD timers, NSR state replication, GRES synchronization, LAG redundancy.

- Network Management and Monitoring

- Description: Managing and monitoring Juniper devices in enterprise networks.

- SNMP (Simple Network Management Protocol) configuration

- Syslog and event logging

- NetFlow/sFlow for traffic monitoring

- Junos Space and Contrail Enterprise Multicloud for network management

- Packet capture and analysis (e.g., using monitor traffic)

- Troubleshooting network performance issues

- Key Terminologies:

- MIB (Management Information Base), trap, syslog severity levels, flow records, packet sampling, RPM (Real-time Performance Monitoring), SLA (Service Level Agreement).

- Advanced Security Features

- Description: Implementing security mechanisms to protect enterprise networks.

- Firewall filters (ACLs) and policers

- Security policies and zones

- Unified Threat Management (UTM): Antivirus, Web filtering, IPS

- Screen options for DoS protection

- Troubleshooting security policy issues

- Stateful firewall, stateless firewall, security zone, ALG (Application Layer Gateway), DoS (Denial of Service), IDS/IPS (Intrusion Detection/Prevention System), policer bandwidth limits.

- Software-Defined Networking (SDN) and Automation

- Description: Understanding modern networking trends, including SDN and automation, as they apply to Juniper platforms.

- SDN concepts and Junipers Contrail Enterprise Multicloud

- Network automation using Python, PyEZ, or Ansible

- YANG data modeling and NETCONF

- EVPN-VXLAN for data center fabrics

- Troubleshooting SDN and automation scripts

- SDN controller, overlay/underlay networks, VXLAN (Virtual Extensible LAN), BGP EVPN, API (Application Programming Interface), RPC (Remote Procedure Call), telemetry.

- Advanced Junos Enterprise Routing (AJER): Covers advanced routing protocols (OSPF, IS-IS, BGP) and policies.

- Advanced Junos Enterprise Switching (AJEX): Focuses on Ethernet switching, VLANs, and data center technologies.

- IGPs: LSDB, LSA, SPF, DR/BDR, ABR, ASBR, NET, CLNS, route redistribution.

- BGP: AS Path, Next Hop, Local Preference, MED, route reflector, confederation, flap damping.

- IP Multicast: Multicast group, IGMP, PIM, RPF, mroute, shared tree, source tree.

- Ethernet Switching: VLAN, 802.1Q, PVLAN, Virtual Chassis, EVPN, STP, LAG, MC-LAG.

- Layer 2 Security: 802.1X, MAC RADIUS, DHCP snooping, ARP inspection, storm control.

- Protocol-Independent Routing: Static route, VRF, ECMP, FBF, route preference.

- High Availability: GRES, NSR, NSB, VRRP, BFD, LACP.

- Network Management: SNMP, syslog, NetFlow, sFlow, Junos Space, packet capture.

- Security: Firewall filter, security zone, UTM, DoS screen, policer.

- SDN/Automation: SDN, VXLAN, EVPN, PyEZ, NETCONF, YANG, telemetry.

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