Notes and Exam Topics 1

Exam Topics Breakdown for JNCIA-ER (JNO-342)

Audience Considerations: Operating Juniper Networks Routers in the Enterprise

The prerequisite is a basic understanding of the TCP/IP protocols.
While not required, familiarity with the command-line interface of a routing platform or UNIX system is helpful.

Exam Objectives

list line of enterprise routers
describe transit and host processing
packet flow differences between M7i/M10 and J-Series routers
key differences between the M7i/M10 and J-Series routers
configuration management
JUNOS CLI features (modes, prompts, auto-complete, EMACS keystrokes, and pipe
commands used in configuration mode (edit, set, delete, and commit)
manipulation of saved configuration files (rollback and load, and rollback file locations)
describe the configuration hierarchy
describe active, candidate, and rollback configurations

Acronyms of the Moment:

RE: Routing Engine
FRU: Field Replaceable Units
ASIC: Application Specific Integrated Circuit
PIC: Physical Interface Card
FPC: Flexible Physical Interface Card Concentrator
PFE: Packet Forwarding Engine
PIM: Physical Interface Module
BSD: Berkeley Software Development
OJRE: Operating Juniper Routers in the Enterprise
CLI: Command Line Interface
GUI: Graphical User Interface
BGP: Border Gateway Protocol
MPLS: Multi-Protocol Label Switching (Traffic Shaped/Engineered Networks)
ISP: Internet Service Provider

We love our High-End Hardware!
M-Series and T-Series Selling Points: Your Network Core

Runs JUNOS, the Operating system found on Juniper Networks routers
JUNOS is derived FreeBSD Unix for software stability
Hardware based packet forwarding through the use of ASICs
Separate forwarding and Control Planes (More on this later!)
Web-based GUI management in addition to CLI
Rescue Configuration Option: rollback rescue
Supports multiple different physical media types in a single chassis

Where Exactly Do We Put Our M or T Router?
M and T platforms usually service large company enterprises and Internet Service Providers. These and other large companies comprise what is called “the backbone of the Internet.”

More notes coming soon!!!