Information Technology Reference
In-Depth Information
Study Guide
Inside the Router
A router is a computer and has many of the common hardware components found on other types of computers. A router
also includes an operating system. The exercises in this section will reinforce your understanding of the basic hardware
and software components of a router. You will also gain a better understanding of the routing and packet-forwarding
process.
Vocabulary Exercise: Matching
Match the definition on the left with a term on the right. This exercise is not necessarily a one-to-one matching. Some
definitions might be used more than once, and some terms might have multiple definitions.
Definitions
a.
Because routers do not necessarily have the same
information in their routing tables, packets can
traverse the network in one direction, using one
path, and return through another path.
b.
Routing protocols use __________ to evaluate
what path will be the best for a packet to travel to
a destination network.
c.
Routing that depends on manually entered routes
in the routing table.
d.
A management port on the router.
e.
A company that provides WAN technologies to
connect the customer's local networks to the
Internet and other remote networks.
f.
Most common LAN technology.
g.
Table of IP address-to-MAC address mappings
used by routers that have Ethernet interfaces.
h.
The fastest route to a certain destination, which is
based on the routing protocol's metric.
i.
A data link layer technology often used for WAN
links.
j.
A dynamic routing protocol used by routers to
determine the best path for IP packets.
k.
Port on the router that can be attached to a
modem for remote management access.
l.
A series of questions prompting the user for basic
configuration information because the router did
not locate a startup configuration file.
m.
A form of permanent storage used by Cisco
devices to store the bootstrap instructions, basic
diagnostic software, and a scaled-down version of
IOS.
n.
A router's ability to use multiple paths to the
same destination because the paths have the same
metric value.
o.
Identifies how many routers can be traversed by
the datagram before being dropped.
p.
Stores the instructions and data needed to be exe-
cuted by the CPU.
q.
An end device or node on the network that
implies a computer system.
r.
This router mode allows the user to make configu-
ration changes. The router prompt will change
from a “>” to a “#.”
s.
A router's ability to send packets over multiple
networks, even when the metric is not the same.
t.
Common process that occurs on most every com-
puter during bootup to test the router hardware.
u.
Used by the Cisco IOS as permanent storage for
the startup configuration file.
v.
Nonvolatile computer memory that is used as per-
manent storage for the operating system, Cisco
IOS.
w.
Port used to initially configure a router.
x.
Used by the router to determine the best path to
forward the packet.
Used by routers to automatically learn about
remote networks and build their routing tables.
y.
