Which two statements are true regarding the role of the Routing Engine (RE)? (Choose two.)
A.
The RE controls and monitors the chassis.
B.
The RE manages the Packet Forwarding Engine (PFE).
C.
The RE receives a copy of the forwarding table from the forwarding plane.
D.
The RE implements class of service (COS).
Explanation:
A and B
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The Routing Engine handles all routing protocol processes, as well as the software processes that control the router’s interfaces, the chassis components, system management, and user access to the router. These routing and software processes run on top of a kernel that interacts with the Packet Forwarding Engine.
The Routing Engine includes the functions and features:
Processing of routing protocol packets—The Routing Engine handles all packets that concern routing protocols, freeing the Packet Forwarding Engine to handle only packets that represent Internet traffic.
Software modularity—Because each software process is devoted to a different function and uses a separate process space, the failure of one process has little or no effect on the others.
In-depth Internet functionality—Each routing protocol is implemented with a complete set of Internet features and provides full flexibility for advertising, filtering, and modifying routes. Routing policies are set according to route parameters (for example, prefix, prefix lengths, and BGP attributes).
Scalability—The Junos routing tables have been designed to hold all the routes in current networks with ample capacity for expansion. Additionally, the Junos OS can efficiently support large numbers of interfaces and virtual circuits.
Management interface—Different levels of system management tools are provided, including the Junos OS command-line interface (CLI), the Junos XML management protocol, the craft interface, and SNMP.
Storage and change management—Configuration files, system images, and microcode can be held and maintained in primary and secondary storage systems, permitting local or remote upgrades.
Monitoring efficiency and flexibility—The router supports functions such as alarm handling and packet counting on every port, without degrading packet-forwarding performance.
The Routing Engine constructs and maintains one or more routing tables (see Figure 1). From the routing tables, the Routing Engine derives a table of active routes, called the forwarding table, which is then copied into the Packet Forwarding Engine. The design of the ASICs allow the forwarding table in the Packet Forwarding Engine to be updated without interrupting forwarding performance.
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New JN0-102 Exam Questions Updated Recently (8/May/2017):
NEW QUESTION 358
Which two statements describe the default behavior for OSPF? (Choose two.)
A. OSPF imports all routes into the inet4.0 routing table.
B. OSPF exports all static routes into the OSPF database.
C. OSPF imports all routes into the inet.0 routing table.
D. OSPF does not export static routes into the OSPF database.
Answer: CD
NEW QUESTION 359
Which two ping command parameters whould be used to troubleshoot MTU issues? (Choose two.)
A. ping do-not-fragment
B. ping rapid
C. ping verbose
D. ping size
Answer: AD
NEW QUESTION 360
Which command prompt indicates that you are in operational mode?
A. user @ router &
B. user @ router #
C. user @ router $
D. user @ router >
Answer: D
NEW QUESTION 361
Which keystroke combination allows users to move the cursor to the beginning of the command line without deleting text?
A. Ctrl + u
B. Ctrl + w
C. Ctrl + a
D. Ctrl + b
Answer: C
NEW QUESTION 362
What is the subnet mask for the 172.45.32.6/19 address?
A. 255.255.224.0
B. 255.255.240.0
C. 255.224.0.0
D. 255.240.0.0
Answer: A
NEW QUESTION 363
Click the Exhibit button. Referring to the exhibit, what happens when ping packets are sent to the management interface address of the local router?
user@router> show route protocol static
inet.0: 15 destinations, 15 routes (15 active, 0 holddown, 0 hidden)
+ = Active Route, – = Last Active, * = Both
99.0.0.0/17 *[Static/5] 00:00:11
————— > to 10.1.1.2 via ge-0/0/1.0
99.0.0.0/19 *[Static/5] 00:00:11
————— > to 10.1.2.2 via ge-0/0/2.0
99.0.0.0/24 *[Static/5] 00:00:11
————— > to 10.1.3.2 via ge-0/0/3.0
99.0.0.0/26 *[Static/5] 00:00:11
————— > to 10.1.4.2 via ge-0/0/4.0
Referring to the exhibit, which next-hop interface will be used to reach the 10.21.14.16 destination?
A. ge-0/0/1.0
B. ge-0/0/0.0
C. ge-0/0/3.0
D. ge-0/0/2.0
Answer: A
NEW QUESTION 364
What is the default firewall filter behavior when a term is matched but no terminating action is specified?
A. an implicit deny and the filter evaluation terminates
B. an implicit accept and the filter evaluation terminates
C. an implicit accept and the filter evaluation continues to the next term
D. an implicit deny and the filter evaluation continues to the next term
Answer: C
NEW QUESTION 365
What are three interface prefixes for a 40-gigabit interface? (Choose three.)
A. et
B. es
C. fte
D. xe
E. xle
Answer: ABE
NEW QUESTION 366
Which source of routing information is preferred by default?
A. static
B. RIP
C. direct
D. BGP
Answer: C
NEW QUESTION 367
For the interface ge-1/2/3.4, what does “ge” represent?
A. SONET/SDH
B. Gigabit Ethernet
C. Aggregated Ethernet
D. GRE
Answer: B
NEW QUESTION 368
Which word starts a command to display the operational status of a Junos device?
A. put
B. set
C. show
D. get
Answer: C
NEW QUESTION 369
……
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