|
Which protocol’s header would a Layer 4 device read and process? |
TCP |
|
What number does a host use to identify the application involved in a transmission? |
Port number |
|
What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? |
Checksum |
|
At which OSI layer does IP operate? |
Network layer |
|
Which OSI layer is responsible for directing data from one LAN to another? |
Network layer |
|
What kind of route is created when a network administrator configures a router to use a specific path between nodes? |
Static route |
|
When a router can’t determine a path to a message’s destination, where does it send the message? |
Gateway of last resort |
|
A routing protocol’s reliability and priority are rated by what measurement? |
AD |
|
Which routing protocol does an exterior router use to collect data to build its routing tables? |
BGP |
|
When messages to a remote Web server are being lost for no apparent reason and you suspect the problem might be a path MTU black hole, which TCP/IP utility can you use to diagnose the problem? |
ping |
|
What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol? |
Framing |
|
What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet? |
Differentiated Services (DiffServ) |
|
A modern ASN consists of how many bits? |
32 |
|
What netstat command option lists only current connections, including IP addresses and port numbers? |
-n |
|
By default, the pathping command sends how many pings per hop? |
100 |
|
Which network routing protocol is a path vector protocol that sends updates between routers using TCP? |
BGP |
|
What protocol replaces ARP, IGMP, and ICMPv4 on IPv6 based networks? |
ICMPv6 |
|
At what layer of the OSI model would a TCP or UDP header be added to a payload? |
Layer 4 |
|
In a TCP segment, what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding? |
sliding window |
|
Which of the following is not a task handled by a router? |
A router forwards broadcasts over the network. |
|
The IP connectionless protocol relies on what other protocol to guarantee delivery of data? |
TCP |
|
What command can be used on a Cisco router to view the routing table? |
show ip route |
|
What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams? |
-I |
|
What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission? |
checksum |
|
What happens when a router receives a packet with a TTL of 0? |
The router drops the packet and sends an ICMP TTL expired message back to the host. |
|
In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to? |
flow label |
|
What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing? |
IGMP |
|
When viewing the routing table on a UNIX system, what flag indicates if a route is a usable route? |
U |
|
What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage? |
convergence time |
|
What type of routing protocol enables routers to communicate beyond neighboring routers, allowing each router to create a map of an entire network? |
link state |
Share This
Flashcard
