Chapter 6 Exam

A router boots and enters setup mode. What is the reason for this? 1. The configuration file is missing from NVRAM. 2. The IOS image is corrupt. 3. Cisco IOS is missing from flash memory. 4. The POST process has detected hardware failure

1

A router may have to fragment a packet when forwarding it from one medium to another medium that has a smaller _______

MTU

Fill in the blank. The acronym _______ is used to define the process that allows multiple devices to share a single routable IP address

NAT

If there are two or more possible routes to the same destination, the _________ is used to determine which route is used in the routing table

metric

During the boot process, where will the router bootstrap program look for the IOS image by default? 1. Flash 2. NVRAM 3. RAM 4. ROM

1

What are two characteristics of IP? (Choose two.) 1. Operates independently of the network media 2. Does not require a dedicated end-to-end connection 3. Guaranties delivery of packets 4. Retransmits packets if errors occur 5. Re-assembles out of order packets into the correct order at the receiver end

1, 2

Following default settings, what is the next step in the router boot sequence after the IOS loads from flash? 1. Locate and load the startup-config file from NVRAM. 2. Load the running-config file from RAM. 3. Load the bootstrap program from ROM. 4. Perform the POST routine.

1

What type of route is indicated by the code C in an IPv4 routing table on a Cisco router? 1. Directly-connected route 2. Static route 3. Default route 4. Dynamic route that is learned through EIGRP

1

Which three commands are used to set up secure access to a router through a connection to the console interface? 1. login 2. line console 0 3. password cisco 4. enable secret cisco 5. line vty 0 4 6. interface fastethernet 0/0

1, 2, 3

What are two types of router interfaces? (Choose two.) 1. WAN 2. DHCP 3. Telnet 4. LAN 5. SVI

1, 4

What is one advantage that IPv6 simplified header offers over IPv4? 1. Efficient packet handling 2. Little requirement for processing checksums 3. Smaller-sized header 4. Smaller-sized source and destination IP addresses

1

Which key combination allows a user to abort setup mode? 1. Ctrl-C 2. Ctrl-R 3. Ctrl-Z 4. Ctrl-Shift-6

1

What is the purpose of the startup configuration file on a Cisco router? 1. To provide a limited backup version of the IOS, in case the router cannot load the full featured IOS 2. To contain the commands that are used to initially configure a router on startup 3. To contain the configuration commands that the router IOS is currently using 4. To facilitate the basic operation of the hardware components of a device

2

When transporting data from real-time applications, such as streaming audio and video, which field in the IPv6 header can be used to inform the routers and switches to maintain the same path for the packets in the same conversation? 1. Next Header 2. Flow Label 3. Traffic Class 4. Differentiated Services

2

Which characteristic describes an IPv6 enhancement over IPv4? 1. IPv6 addresses are based on 128-bit flat addressing as opposed to IPv4 which is based on 32-bit hierarchical addressing. 2. The IPv6 header is simpler than the IPv4 header is, which improves packet handling. 3. The IPv6 address space is four times bigger than the IPv4 address space. 4. Both IPv4 and IPv6 support authentication, but only IPv6 supports privacy capabilities

2

Which statement describes a hardware feature of a Cisco 1941 router that has the default hardware configuration? 1. It does not have an AUX port. 2. It has two types of ports that can be used to access the console. 3. It does not require a CPU because it relies on Compact Flash to run the IOS. 4. It has three FastEthernet interfaces for LAN access.

2

What are two functions that are provided by the network layer? (Choose two.) 1. Carrying data between processes that are running on source and destination hosts 2. Providing end devices with a unique network identifier 3. Placing data on network medium 4. Directing data packets to destination hosts on other networks 5. Providing dedicated end-to-end connections

2, 4

How does the network layer use the MTU value? 1. The network layer depends on the higher level layers to determine the MTU. 2. The network layer depends on the data link layer to set the MTU, and adjusts the speed of transmission to accomodate it. 3. The MTU is passed to the network layer by the data link layer. 4. To increase speed of delivery, the network layer ignores the MTU

3

Refer to the exhibit. Fill in the blank. A packet leaving PC-1 has to traverse______ hops to reach PC-4

3

What IPv4 header field identifies the upper layer protocol carried in the packet? 1. Identification 2. Differentiated Services 3. Protocol 4. Version

3

What routing table entry has a next hop address associated with a destination network? 1. C and L source routes 2. Directly-connected routes 3. Remote routes 4. Local routes

3

When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary? 1. The best-effort delivery process guarantees that all packets that are sent are received. 2. Network layer IP protocols manage the communication sessions if connection-oriented transport services are not available. 3. Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host. 4. Connectionless acknowledgements are used to request retransmission

3

Which field in the IPv4 header is used to prevent a packet from traversing a network endlessly? 1. Acknowledgment Number 2. Differentiated Services 3. Time-to-Live 4. Sequence Number

3

Which portion of the network layer address does a router use to forward packets? 1. Host portion 2. Broadcast address 3. Network portion 4. Gateway address

3

Within a production network, what is the purpose of configuring a switch with a default gateway address? 1. Hosts that are connected to the switch can use the switch default gateway address to forward packets to a remote destination. 2. A switch must have a default gateway to be accessible by Telnet and SSH. 3. The default gateway address is used to forward packets originating from the switch to remote networks. 4. It provides a next-hop address for all traffic that flows through the switch

3

Which two pieces of information are in the RAM of a Cisco router during normal operation? (Choose two.) 1. Startup configuration file 2. Basic diagnostic software 3. IP routing table 4. Cisco IOS 5. Backup IOS file

3, 4

Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network? 1. 192.135.250.1 2. 192.31.7.1 3. 192.133.219.0 4. 192.133.219.1

4

Which IPv4 address can a host use to ping the loopback interface? 1. 126.0.0.1 2. 127.0.0.0 3. 126.0.0.0 4. 127.0.0.1

4

Which characteristic of the network layer in the OSI model allows carrying packets for multiple types of communications among many hosts? 1. The de-encapsulation of headers from lower layers 2. The ability to manage the data transport between processes running on hosts 3. The selection of paths for and direct packets toward the destination 4. The ability to operate without regard to the data that is carried in each packet

4

Which value, that is contained in an IPv4 header field, is decremeneted by each router that receives a packet? 1. Differentiated Services 2. Fragment Offset 3. Header Length 4. Time-to-Live

4