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| Section | Objectives |
|---|---|
| Topic 1: OSPF | - Configuration, monitoring and troubleshooting - OSPFv2/v3 concepts, areas, LSA types - Neighbor relationships, route calculation |
| Topic 2: Protocol Independent Routing | - Configuration, monitoring and troubleshooting - Routing tables, routing preferences - Routing policy and firewall filters - Static routes, aggregate routes |
| Topic 3: Layer 2 Security | - Configuration, monitoring and troubleshooting - Port security, storm control, MAC limiting - Dynamic ARP inspection, DHCP snooping - Layer 2 firewall filters |
| Topic 4: Tunnels | - IP-IP, GRE, IPsec tunnels - Configuration, monitoring and troubleshooting |
| Topic 5: IS-IS | - Configuration, monitoring and troubleshooting - IS-IS concepts, levels, routing information |
| Topic 6: Layer 2 Switching and VLANs | - Configuration, monitoring and troubleshooting - Inter-VLAN routing - VLAN concepts, tagging, ports, native VLAN - Layer 2 switching concepts and operation |
| Topic 7: High Availability | - Configuration, monitoring and troubleshooting - Graceful restart, nonstop active routing - Virtual Chassis, redundant routing engines |
| Topic 8: Spanning Tree Protocol | - Configuration, monitoring and troubleshooting - Root bridge, port roles and states - STP, RSTP, MSTP concepts and operation |
| Topic 9: BGP | - Configuration, monitoring and troubleshooting - IBGP, EBGP, route policies - BGP concepts, attributes, path selection |
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NEW QUESTION # 170
Which statement is true about IP-IP tunnels?
Answer: A
NEW QUESTION # 171
Which two statements about MACsec are true? (Choose two.)
Answer: B,C
NEW QUESTION # 172
You are asked to create a new firewall filter to evaluate Layer 3 traffic that is being sent between VLANs. In this scenario, which two statements are correct? (Choose two.)
Answer: B,D
Explanation:
A firewall filter is a configuration that defines the rules that determine whether to forward or discard packets at specific processing points in the packet flow. A firewall filter can also modify the attributes of the packets, such as priority, marking, or logging. A firewall filter can be applied to various interfaces, protocols, or routing instances on a Juniper device 1 .
A firewall filter has a family attribute, which specifies the type of traffic that the filter can evaluate. The family attribute can be one of the following: inet, inet6, mpls, vpls, iso, or ethernet-switching 2 . The family inet firewall filter is used to evaluate IPv4 traffic, which is the most common type of Layer 3 traffic on a network.
To create a family inet firewall filter, you need to specify the appropriate match criteria and actions for each term in the filter. The match criteria can include various fields in the IPv4 header, such as source address, destination address, protocol, port number, or DSCP value. The actions can include accept, discard, reject, count, log, policer, or next term 3 .
To apply a firewall filter to Layer 3 traffic that is being sent between VLANs, you need to apply the filter to the appropriate IRB interface. An IRB interface is an integrated routing and bridging interface that provides Layer 3 functionality for a VLAN on a Juniper device. An IRB interface has an IP address that acts as the default gateway for the hosts in the VLAN. An IRB interface can also participate in routing protocols and forward packets to other VLANs or networks 4 .
Therefore, option C is correct, because you should create a family inet firewall filter with the appropriate match criteria and actions. Option D is correct, because you should apply the firewall filter to the appropriate IRB interface.
Option A is incorrect, because you should not create a family ethernet-switching firewall filter with the appropriate match criteria and actions. A family ethernet-switching firewall filter is used to evaluate Layer 2 traffic on a Juniper device. A family ethernet-switching firewall filter can only match on MAC addresses or VLAN IDs, not on IP addresses or protocols 5 .
Option B is incorrect, because you should not apply the firewall filter to the appropriate VLAN. A VLAN is a logical grouping of hosts that share the same broadcast domain on a Layer 2 network. A VLAN does not have an IP address or routing capability. A firewall filter cannot be applied directly to a VLAN; it must be applied to an interface that belongs to or connects to the VLAN 6 .
References:
1 : Firewall Filters Overview 2 : Configuring Firewall Filters 3 : Configuring Firewall Filter Match Conditions and Actions 4 : Understanding Integrated Routing and Bridging Interfaces 5 : Configuring Ethernet-Switching Firewall Filters 6 : Understanding VLANs
https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/task/firewall-filter-qfx- series-cli.html
NEW QUESTION # 173
In the exhibit, each IP subnet in the campus environment is associated with a unique VLAN ID.
Which action will ensure that Host C will communicate with Host A and Host B?
Answer: A
NEW QUESTION # 174
What is the maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation?
Answer: C
Explanation:
The maximum allowable MTU size for a default GRE tunnel without IPv4 traffic fragmentation is
1476 bytes. This is because GRE packets are formed by the addition of the original packets and the required GRE headers. These headers are 24-bytes in length and since these headers are added to the original frame, depending on the original size of the packet we may run into IP MTU problems. The most common IP MTU is 1500-bytes in length (Ethernet). When the tunnel is created, it deducts the 24-bytes it needs to encapsulate the passenger protocols and that is the IP MTU it will use. For example, if we are forming a tunnel over FastEthernet (IP MTU 1500) the IOS calculates the IP MTU on the tunnel as: 1500-bytes from Ethernet-24-bytes for the GRE encapsulation = 1476-Bytes.
NEW QUESTION # 175
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