CCNA Ch15.1 Operating Cisco Routers - Installing Cisco Routers | Quizlet

In a network diagram

How does a simplified Ethernet LAN line look like?

Simple straight lines with one or more LAN switches implied but not shown.

In a network diagram

How does a simplified Ethernet WAN line look like?

Shown as a straight line, often with a cloud over it

In a network diagram

How does a simplified Serial WAN line look like?

A line with a crooked part in the middle (a "lightning bolt") represents a typical point-to-point serial link

In a Cisco network diagram

How do the following devices look like?

Routers

Switches

Client Desktops

External CSU/DSU

IP phones

Internal CSU/DSU

CSU/ DSU stands for

service unit/data service unit

Where does a WAN serial link begins and ends?

Terminates and begins at a CSU/ DSU

Looking at a network diagram.

Where does a CSU/DSU sits?

The CSU/ DSU can either sit outside the router as a separate device (as shown on the left at router R1) or integrated into the router's serial interface hardware (as shown on the right).

A WAN serial link cable uses what kind of connector to connect to the CSU/DSU?

RJ-48

TRUE or FALSE?

On the outside the RJ-45 and RJ-48 connector look the same.

TRUE

On the outside, the two look identical—both are housed in miniature 8-position jacks.

SOURCE

https://www.blackboxab.se/sv-se/page/29573/Information/Tekniska-Resurser/Black-Box-Explains/Cables/Cablegroup3/RJ-48#:~:text=An%20RJ%2D48%20plug%20is,two%20are%20for%20the%20drain.

TRUE or FALSE?

The SP will run the cable into the enterprise's wiring closet and put an RJ-48 connector on the end of the cable. This cable connects to the CSU/DSU. No matter if it is an internal or external CSU/DSU.

TRUE

In case of an internal CSU/DSU, what port does the router uses to connect with the RJ-48 connector of the SP's serial cable?

serial port

In case of an internal CSU/DSU, the router uses a serial port to connect with the RJ-48 connector of the SP's serial cable.

How does that port look like?

similar to a RJ-45 port

In case of an external CSU/DSU, how does the CSU/DSU connect with the router?

It must be connected to the router's serial card via a short serial cable.

How does the router's serial card look like?

How does the short serial cable look like?

The connector on the right connects with the router's serial card.

The connector on the left connects with the external CSU/DSU

ISR stands for

integrated services routers

What does Cisco emphasizes using the term integrated services routers?

The multipurpose nature of the product.

So, not only simply routing packets.

Name a 6 services that the integrated services routers might provide.

routing

switching

WAN connectivity

WLAN

security

VoIP

Comparing a central site with a branch office, which site would benefit most from the integrated services routers?

Why?

Branch office

Because it is smaller in comparison. It doesn't have the space, budget or need to have highly specialized devices.

The Cisco ISR, model 4321, has two NIM slots.

How does a 2-port serial NIM card look like?

What is the purpose of the serial NIM card with a NIM port?

It is a serial WAN router interface card

SOURCE

https://www.networktigers.com/products/nim-4t-cisco-interface-card

NIM stands for

network interface module

How does the connector look like that connects with a port of a serial NIM card?

What is the router's AUX port used for?

The router's auxiliary (AUX) port functions as a backup async port. It is most commonly used as a backup console port, but it can also be used as a dial-up port for remote router management and many other functions.

SOURCE

https://www.oreilly.com/library/view/cisco-ios-in/156592942X/ch04s06.html#:~:text=The%20router's%20auxiliary%20(AUX)%20port,management%20and%20many%20other%20functions.

Looking at the Cisco ISR, model 4321. It has 2 ports for Gi0/0.

One is a RJ-45 port, the other is a SPF port.

What can you say about using these ports simultanously?

You can't.

Either use one or the other at any point in time.

Looking at the Cisco ISR, model 4321. It has 2 ports for Gi0/0.

One is a RJ-45 port, the other is a SPF port.

What does the RJ-45 port imply?

That it is used to connect to a LAN

Looking at the Cisco ISR, model 4321. It has 2 ports for Gi0/0.

One is a RJ-45 port, the other is a SPF port.

What does the SPF port allow you to do?

It supports various fiber Ethernet standards, allowing the port to be used for Ethernet WAN purposes.

TRUE or FALSE?

Ethernet WANs require fiber cables.

FALSE

You can also use RJ-45 ports and UTP cables.

However, these cables do have a distance limit.

For longer distances, you are forced to use fiber cables.

How do you physically install the router for any serial WAN port?

A. If using an external CSU/ DSU, connect the router's serial interface to the CSU/ DSU and the CSU/ DSU to the line from the telco.

B. If using an internal CSU/ DSU, connect the router's serial interface to the line from the telco.

How do you physically install the router for any Ethernet WAN port?

A. When ordering the Ethernet WAN service, confirm the required Ethernet standard and SFP type required to connect to the link, and order the SFPs.

B. Install the SFPs into the routers, and connect the Ethernet cable for the Ethernet WAN link to the SFP on each end of the link.

TRUE or FALSE?

Between routers and switches.

Typically only routers have an on/off switch

TRUE

SOHO routers typically have two features that an enterprise router would be less likely to have.

What are they?

1. SOHO routers almost always use the Internet and virtual private network (VPN) technology for their WAN connections to send data back and forth to the rest of the Enterprise.

2. SOHO routers almost always use a multifunction device that does routing, LAN switching, VPN, wireless, and maybe other features.

What is optimal range of the number of network users for the SOHO router?

4 to 10