Chapter 4 – Routing Fundamentals
TRUE/FALSE
1. To determine best path, routers use metrics such as the value of the first octet of the destination IP
address.
2. A rollover cable is wired similarly to an Ethernet cable except that pins 7 and 8 are crossed.
3. Current Microsoft OSs include IPv6, but to use it, you must enable it first.
4. Cisco routers support both numbered and named ACLs, starting with IOS version 11.2.
5. Some methods of attacking a Cisco router do not require knowledge of the IOS version, so software
patching is recommended.
MULTIPLE CHOICE
1. Which of the following types of traffic does NOT travel through routers?
a.
DNS zone transfers
c.
SNMP status information
b.
ARP requests
d.
network route information
2. Which of the following is a metric routers can use to determine best path?
a.
datagram size
c.
link state
b.
packet TTL
d.
network protocol
3. What is contained in ARP tables?
a.
IP address, MAC address
c.
NetBIOS name, IP address
b.
DNS name, IP address
d.
MAC address, TCP port
4. To what type of port on a Cisco router do you connect a rollover cable?
a.
auxiliary
c.
Frame Relay
b.
console
d.
Ethernet
5. Which of the following is NOT a type of entry found in a routing table?
a.
default routes
c.
dynamic routes
b.
static routes
d.
backup routes
6. Which of the following is true about static routes?
a.
the metric is higher than a dynamic route
c.
they are used for stub networks
b.
they are created by routing protocols
d.
they change automatically as the network
changes
7. What uses mathematical calculations to compare routes based on some measurement of distance?
a.
route summarization
c.
routing metrics
b.
link-state routing protocols
d.
distance-vector routing protocols
8. Which of the following makes routing tables more efficient?
a.
route summarization
c.
CIDR
b.
VLSM
d.
host routing
9. What feature does RIPng support that is not supported by RIP?
a.
gigabit Ethernet
c.
IPv6
b.
supernetting
d.
32-bit addresses
10. Which feature of a router provides traffic flow and enhances network security?
a.
VLSMs
c.
TCP
b.
ACLs
d.
CIDR
11. Which of the following is true about ACLs on Cisco routers?
a.
there is an implicit deny any statement at
the end of the ACL
c.
ACLs are processed in reverse order so
place high priority statements last
b.
there is an explicit permit any statement at
the beginning of the ACL
d.
ACLs bound to an interface apply to
inbound and outbound traffic by default
12. Which of the following is true about standard IP ACLs?
a.
they can filter on source and destination IP
address
c.
a 0.0.0.0 inverse mask means all bits are
significant
b.
they automatically apply to all active
interfaces
d.
they can filter on IP address and port
13. Which of the following is true about extended IP ACLs?
a.
the ‘established’ keyword is not available
except on standard ACLs
c.
the default inverse mask for the source is
0.0.0.0
b.
you can apply multiple outbound ACLs on
a single interface
d.
they should be applied to an interface
close to the traffic source
14. What should you set up if you want to store router system log files on a server?
a.
AAA server
c.
TTY connection
b.
syslog server
d.
buffered logging
15. Which of the following is a command you would find in an antispoofing ACL for network
172.31.0.0/16?
a.
permit ip any 172.31.0.0 0.0.255.255
log
c.
deny ip 172.31.0.0 0.0.255.255 any log
b.
deny TCP 172.31.0.0 0.0.0.0 any log
d.
permit icmp any any redirect
16. Which of the following is an open standard used for authentication on Cisco routers?
a.
RADIUS
c.
CHAP
b.
ATM
d.
ACE
17. Which of the following types of password prevents a user from accessing privileged exec mode on a
Cisco router?
a.
console
c.
enable
b.
AUX
d.
TTY
18. What remote shell program should you use if security is a consideration?
a.
rlogin
c.
rcp
b.
ssh
d.
rsh
19. What Cisco router command encrypts all passwords on the router?
a.
enable secret password
c.
crypto key passwords
b.
secure passwords enable
d.
service password-encryption
20. Which protocol that runs on Cisco routers shares information between Cisco devices?
a.
CDP
c.
bootp
b.
TCP
d.
SSH
COMPLETION
1. During the routing process, the router strips off ______________________ layer header information
and then examines the Network layer address.
2. An ARP broadcast is sent to the local subnet in an attempt to discover the destination computer’s
______________ address.
3. ____________ routes are manually configured routes that direct all packets not specifically configured
in the routing table.
4. Rather than using classful routing, ________________ subnet masks allow you to divide your network
into different sizes to make better use of available addresses.
5. The enable ___________ password uses type 5 encryption and overrides the enable password.
MATCHING
a.
ACE
f.
inverse mask
b.
ARP table
g.
metrics
c.
banner
h.
routing
d.
console port
i.
stub router
e.
convergence
j.
virtual terminal
1. the port on a Cisco device that permits direct physical access from a nearby computer using the serial
RS-232 protocol
2. cost values that help routers assess the desirability of a link
3. virtual session access points for simultaneous access to a Cisco device
4. a state in which all routers on a network have up-to–date routing tables
5. a router that connects a stub network to the larger network
6. a network system tool that lists the MAC and IP address resolutions of other
devices on the network, making the resolution process more efficient
7. the number in an access control list that specifies which part of an IP address is considered significant
8. an individual rule in an ACL
9. the process of transporting packets of information across a network from the
source node to the destination node
10. a message, usually a warning about appropriate use, presented to users of a digital system before
authentication
SHORT ANSWER
1. Describe how a computer uses its ARP table and the ARP protocol when preparing to transmit a
packet to the local network.
2. What is a dynamic route?
3. What is a stub router and where would you find one?
4. What is a distance-vector routing protocol? Give one example.
5. Define metric and give three examples of common metrics that routers use.
6. Define route summarization.
7. Describe ACLs.
8. Where in an internetwork should extended ACLs be applied?
9. Describe antispoofing logging and how you can prevent it with ACLs.
10. List the five types of Cisco router passwords.