IP Addressing
How many hosts does a /25 CIDR have?
126
What mode is represented by the prompt:
Router#
Privileged EXEC mode
Switches _________ collision domains.
stop, break, or end
Routers are found in what layer of the TCP/IP model?
Internet Layer
What metric does OSPF use?
a. hop-count
b. cost
c. Dykstra
d. Administrative distance
b. cost
What layer of the OSI model is TCP and UDP located in?
Layer 4 - Transport
What is a Public IPv6 Address Called?
a. Link-Local
b. Global Unicast Address (GUA)
c. Public IPv6
d. Logical Link Address (LLA)
b. Global Unicast Address (GUA)
When booting up, what does a Cisco router do first?
run POST
What protocol is used to aid in IP address to MAC address discovery?
Address Resolution Protocol (ARP)
What type of routing is ideal for small networks and is manually configured?
Static Routing
What is the default administrative distance of OSPF?
a. 90
b. 110
c. 120
d. 1
b. 110
What are two port numbers used for SNMP
161 and 162
What CIDR would fulfill 500 hosts?
/23
What are three locations that a Cisco device can locate the IOS? (100 pts per correct answer)
Flash, TFTP, or ROMMON
Which distinct type of VLAN is used by an administrator to access and configure a switch? (often called the "out-of-the-box" VLAN)
native VLAN
An administrator issues the commands:
Router(config)# interface g0/1
Router(config-if)# ip address dhcp
What is the administrator trying to achieve?
a. enabling a DCHP server
b. Enabling the interface to receive and IP from the DHCPv4 server
c. Configuring a relay agent
b. Enabling the interface to receive and IP from the DHCPv4 server
What two routers have completely converged their routing tables with their neighbors. What do they create?
A Neighbor Adjacency
A network administrator configures an ACL with the command R1(config)# access-list 1 permit 172.16.0.0 0.0.15.255. Which two IP addresses will match this ACL statement? (Choose two.)
a. 172.16.0.45
b. 172.16.16.104
c. 172.16.15.90
d. 172.16.65.20
d. 172.16.35.22
a. 172.16.0.45
b. 172.16.15.90
(0.0.15.255 = 255.255.240.0)
Magic number is 16
Host range 172.16.0.1 - 172.16.15.254
What is the Wildcard Mask of /28
0.0.0.15
What command enables an encrypted password in Privileged Mode?
enable secret [password]
What file is created with the addition/configuration of a non-native VLAN?
a. flash
b. Running-config
c. Start-up Config
d. vlan.dat
e. vlan.txt
d. vlan.dat
Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?
a. next-hop
b. gateway of last resort
c. route source
d. outgoing interface
b. gateway of last resort
The OSPF hello timer has been set to 15 seconds on a router in a point-to-point network. By default, what is the dead interval on this router?
60 seconds (4 times the hello timer)
What are the two types of IPsec?
AH = Authentication Headers
ESP = Encapsulation Security Payload
What network does host 192.168.1.70/26 belong to?
192.168.1.64
An administrator issues the command confreg 0x2142 at the rommon 1> prompt. What is the effect when this router is rebooted?
a. contents in RAM will be erased
b. contents in RAM will be ignored
c. contents in NVRAM will be erased
d. contents in NVRAM will be ignored
d. contents in NVRAM will be ignored
(this skips the Start-up config file)
Which switching method makes use of the FCS value?
a. Broadcast
b. Cut-through
c. Store-and-forward
d. Large frame buffer
c. Store-and-forward
Which two route source codes are automatically created within a routing table whenever a router interface is configured with an IP address and activated?
L and C
In order to create an adjacency, what 5 items must match? (100 pts per correct answer)
H - Hello/Dead Timers
A - Area ID
N - Neighbors
N - Network Mask
A - Authentication (if applicable)
from User EXEC mode to completion, what minimum 7 commands, (in order), must you execute to set up an interface IP address?
Router> enable
Router# configuration terminal
Router (config)# interface [name]
Router (config-if)# ip address [ip address][mask]
Router (config-if)# no shut
Router (config-if)# end
Router# copy running-config startup-config