Ch. 8-9 Test Flashcards
On a TCP/IP network, a router determines where an incoming packet should go by looking at the packet’s __________.
destination IP addresses
At which layer of the OSI model do routers work?
Network
Which column in a routing table tells the router which of its ports to use?
Interface
When a router has more than one route to the same network, the responsibility for assigning a different metric for each route lies with the __________.
person in charge of that router
Which tool can be used to access a Cisco router remotely from a Windows 7 system?
PuTTY
Which form of NAT typically handles the one-to-many connections?
Port Address Translation (PAT)
What is another name for dynamic NAT?
Pooled NAT
Which type of NAT allows many computers to share a pool of routable IP addresses that number fewer than the computers?
Dynamic NAT
Your company has a single server on the private LAN that it wants to make accessible from the Internet. Which of the following would give the server the protection of NAT, while allowing access to that server from the Internet?
Port forwarding
__________ maps a single routable (that is, not private) IP address to a single machine, enabling you to access that machine from outside the network.
Static NAT
Which NAT technology uses port numbers to map traffic from specific machines on the network?
PAT
Which term refers to the passage of a packet through a router?
Hop
Which routing metric determines the largest frame a particular technology can handle?
MTU
Which routing metric refers to the ability of a connection to handle more data than others?
Bandwidth
Which vector routing protocol is the oldest?
RIP
What is the maximum number of hops allowed by RIP?
15
Which protocol is a path vector routing protocol?
BGP
What protocol was adopted in 1994, and is now considered obsolete except for small, private WANs?
RIPv2
Which protocol is a distance vector routing protocol?
RIPv2
Which routing protocol does not support Variable-Length Subnet Masking (VLSM)?
RIPv1
Which of the following could be a valid Autonomous System Number (ASN)?
1.33457
The protocol used by Autonomous Systems to communicate with each other is generically called a(n) __________.
Exterior Gateway Protocol (EGP)
Which organization assigns Autonomous System Numbers (ASNs)?
Internet Assigned Numbers Authority (IANA)
Which attribute applies to the OSPF routing method?
It uses a link state algorithm.
Which protocol is used on the Internet for communication between Autonomous Systems?
Border Gateway Protocol (BGP-4)
Which protocol is a link state dynamic routing protocol?
IS-IS
By convention, what is the name given to Area ID 0 (zero) of an Open Shortest Path First (OSPF) network?
Backbone
Which value represents the core or backbone area of an OSPF network?
0.0.0.0
Which routing protocol is the choice in most large enterprise networks?
EIGRP
Which protocol is Cisco’s proprietary protocol?
EIGRP
What is the name of the proprietary cable designed by Cisco for connecting to their routers?
Yost
What is the name of Cisco’s proprietary operating system?
Cisco IOS
Which tool is used by an administrator to manage many routers and obtain an overall view of all the routers?
Network Management System (NMS)
What tasks should be performed as soon as an administrator finishes configuring a router?
Document how you configured the router and back up the router configuration.
Which tool records the route between any two hosts on a network and can be used to troubleshoot routing problems?
traceroute
Two computers first acknowledges the other, after which they conduct their communication. They end by closing the communication. Which term describes this communication process?
Connection-oriented
Which protocol is by far the most common type of session on a typical TCP/IP network?
TCP
Which protocol is best for simple, connectionless applications that never need more than a single packet?
ICMP
Using the ping command, which message is displayed if your computer has no route to the address listed?
Destination host unreachable
A particular multicast called an IGMP group is assigned to which address?
224.0.0.0/4
If you ping a device and no echo reply comes back before the 1-second default time, ping will respond with a __________ message.
request timed out
What name is given to the port numbers in the range of 0 to 1023?
Well-known port numbers
A Web client’s source port number, generated pseudo-randomly by the Web client computer, is classically assigned as a(n) __________.
ephemeral port number
Which type of port has a number in the 1024 to 49151 range?
Registered port
Which term refers to ports in the 49152 to 65535 range?
Dynamic port
Which term refers to session information stored in RAM by a computer on one side of a session?
Endpoint
Which term refers to another name for a session?
Connection
Which command is known as the “show me the endpoint” command?
Netstat
Which term describes the status for a socket that is prepared to respond to any IP packets destined for that socket’s port number?
Open port
Which term describes the status of a port that is part of an active working endpoint pair?
Established port
Which switch is used with the Windows netstat command to show the process ID?
-o
Which switch is used with the Windows netstat command to show name of a running program?
-b
Which free Web server was originally created for the UNIX/Linux platforms, but now runs on multiple operating systems (including Windows)?
Apache HTTP Server
What type of key does SSL use to encrypt communication?
Public
Which Linux and UNIX e-mail server program controls about 20 percent of the market and only runs the SMTP protocol?
Sendmail
